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Correct Answer Logic:
Correct Answer: B — Primary prevention

Levels of Prevention (Leavell & Clark):
LevelGoalExamples
PrimordialPrevent risk factors from emergingHealth policies, societal change
PrimaryPrevent disease before it occursVaccination, health education, sanitation
SecondaryEarly detection and prompt treatmentScreening tests, early diagnosis (e.g., mammography, TB skin test)
TertiaryReduce disability; rehabilitationPhysiotherapy, chronic disease management, support groups
Hepatitis B vaccination prevents disease before exposure occurs — this is primary prevention (health protection). Note: Secondary prevention would be testing nurses for hepatitis B exposure after a needlestick injury.
Uploaded by: Fani Warraich
Physics QUESTION #394
Question 3542
The cobalt is absorbed by
  • Bones
  • Skin
  • Liver✔️
  • Thyroid gland
Correct Answer Logic:
Radioactive cobalt accumulates in liver
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Egnlish QUESTION #669
Question 3543
Who wrote the play "King Lear"?
  • Christopher Marlowe
  • William Shakespeare✔️
  • Ben Jonson
  • John Webster
Correct Answer Logic:
King Lear is one of Shakespeare's greatest tragedies, written around 1605-1606.
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Boilers Mechanical Engineering QUESTION #4060
Question 3544
'Non-Destructive Testing' (NDT) includes methods like:
  • Breaking the boiler with a hammer
  • Ultrasonic, X-ray, and Dye-penetrant testing✔️
  • Operating the boiler until it fails
  • Painting the boiler
Correct Answer Logic:
NDT allows inspection of welds and metal thickness without damaging the component.
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General Abilities QUESTION #7659
Question 3545
If three arithmetic means are inserted between 5 and 25, the second arithmetic mean is:
  • \(10\)
  • \(15\)✔️
  • \(20\)
  • None of these
Correct Answer Logic:
When three arithmetic means are inserted between 5 and 25, we have 5 terms total: 5, a₁, a₂, a₃, 25. Common difference \(d = \frac{25-5}{4} = 5\). The terms are: 5, 10, 15, 20, 25. The second arithmetic mean is 15.
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English QUESTION #7545
Question 3546
Choose the correct meaning of the word pair "Complement and Compliment"
  • Complement = to complete; Compliment = to praise.✔️
  • Complement = to praise; Compliment = to complete.
  • Both mean "to criticize."
  • Both mean "to correct."
Correct Answer Logic:
Complement means something that completes or goes well with something else; "Compliment" means an expression of praise or admiration.
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Accounting & Finance QUESTION #6187
Question 3547
Why is the 'Cash Coverage Ratio' typically higher than the 'Interest Coverage Ratio (TIE)'?
  • It excludes interest payments.
  • It includes non-cash expenses like depreciation in the numerator.✔️
  • It is calculated after taxes.
  • It uses market value instead of book value.
Correct Answer Logic:
Cash Coverage Ratio adds depreciation (a non-cash expense) back to EBIT, increasing the numerator relative to the TIE ratio [cite: 39].
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Civil Engineering QUESTION #6579
Question 3548
A barrage constructed across a river is primarily designed for:
  • River diversion✔️
  • Water storage
  • River diversion and storage
  • Recreational purposes
Correct Answer Logic:
A barrage is a low-head hydraulic structure built primarily to divert river water into canals/channels for irrigation. Unlike a dam, it provides minimal storage.
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Correct Answer Logic:

  Using the Desired-Available formula for drug dosage calculation:

  \[   \text{Tablets} = \frac{\text{Desired dose}}{\text{Available dose per tablet}}   = \frac{0.25 \text{ mg}}{0.125 \text{ mg per tablet}} = 2 \text{ tablets}   \]

  Critical nursing points for Digoxin:

  •  
  • Assess apical pulse for 1 full minute before administering
  •  
  • Withhold and notify physician if pulse < 60 bpm (adults) or < 100 bpm (infants)
  •  
  • Therapeutic range: \( 0.5\text{–}2.0 \text{ ng/mL} \)
  •  
  • Toxicity signs: bradycardia, nausea/vomiting, visual disturbances (yellow-green halos), arrhythmias
  •  
  • Hypokalemia increases digoxin toxicity risk
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Correct Answer Logic:
نظمِ معرا (Blank Verse) وہ نظم ہے جو ایک مخصوص بحر اور وزن میں ہو لیکن قافیہ اور ردیف سے آزاد ہو۔ نظمِ آزاد بحر اور وزن کی پابندی سے بھی آزاد ہوتی ہے۔ ہائیکو ایک جاپانی صنف ہے اور رباعی چار مصرعوں کی مخصوص صنف ہے۔
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Islamic Studies QUESTION #7894
Question 3551
What is the total number of types of Qias (Analogy)?
  • Two
  • Three✔️
  • Four
  • Five
Correct Answer Logic:
There are four types of Qias (Analogical Reasoning) in Islamic jurisprudence: (1) Qiyas al-'Illah (reasoning by effective cause), (2) Qiyas al-Dalalah (reasoning by indication), (3) Qiyas al-Shabah (reasoning by resemblance), and (4) Qiyas al-Tard (reasoning by co-existence). Qias is the fourth source of Islamic law after Quran, Sunnah, and Ijma.
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Urdu QUESTION #5065
Question 3552
اردو کی آخری کتاب کس کی تصنیف ہے؟
  • ڈپٹی نذیر احمد
  • شفیع محمد چودھری
  • عبدالحلیم شرر
  • ابنِ انشا✔️
Correct Answer Logic:
'اردو کی آخری کتاب' ابنِ انشا کی مزاحیہ و ادبی تصنیف ہے۔
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Pakistan Affairs QUESTION #158
Question 3553
What did the 1936 Congress manifesto state about the Govt of India Act 1935?
  • Congressmen were to cooperate fully
  • Congressmen were to work for the betterment of India
  • Congressmen were to combat the Act and seek to end it✔️
  • The manifesto did not address the Act
Correct Answer Logic:
While Congress contested elections, their stated goal was to wreck the Act from within.
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Correct Answer Logic:
In 'The Power Elite' (1956), C. Wright Mills argued that real power in the United States is held by a small group of men who occupy the command posts of the major institutional hierarchies — large corporations, the military, and the executive branch of government — whose interests are intertwined and who make the most consequential decisions affecting society.
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Boilers Mechanical Engineering QUESTION #2546
Question 3555
The product of inertia \(I_{xy}=\int xy\,dA\) is ZERO when:
  • The area has no curved boundaries
  • The area is symmetric about EITHER the x- OR y-axis✔️
  • The second moments \(I_x\) and \(I_y\) are equal
  • The area is a polygon
Correct Answer Logic:
The product of inertia is zero whenever the area has an axis of symmetry that coincides with either the x- or y-axis. The symmetric pairs of elemental areas contribute equal and opposite \(xy\,dA\) terms that cancel.
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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3453
Question 3556
'Steroids' like estrogen and testosterone are derived from:
  • Amino acids
  • Glucose
  • Cholesterol✔️
  • Phosphate
Correct Answer Logic:
Cholesterol is the parent compound for all steroid hormones.
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General Knowledge QUESTION #165
Question 3557
The UN Climate Change Conference 2024 (COP29) was held in:
  • Azerbaijan✔️
  • Tajilistan
  • Turkamanistan
  • None of these
Correct Answer Logic:
COP29 took place in Baku, Azerbaijan, in November 2024.
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Library Sciences QUESTION #1527
Question 3558
The Internet Public Library (IPL) is best classified as which type of reference resource?
  • A subscription-based full-text database
  • A freely accessible, librarian-selected and organized web reference portal✔️
  • A government document repository
  • A union catalogue of academic libraries
Correct Answer Logic:
The Internet Public Library (IPL) is a freely accessible online reference resource where library professionals select, organize, and annotate quality web resources — functioning as a curated reference portal rather than a commercial database or government repository.
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Mathematics QUESTION #1324
Question 3559
In the variation of parameters method, the Wronskian of two solutions \(y_1\) and \(y_2\) is defined as:
  • \(W=y_1y_2'+y_2y_1'\)
  • \(W=y_1y_2'-y_2y_1'\)✔️
  • \(W=y_1'-y_2'\)
  • \(W=y_1y_2\)
Correct Answer Logic:
The Wronskian of two functions \(y_1\) and \(y_2\) is the determinant of the matrix of the functions and their derivatives: \(W=\begin{vmatrix}y_1&y_2\\y_1'&y_2'\end{vmatrix}=y_1y_2'-y_2y_1'\). If \(W\neq0\) on an interval, \(y_1\) and \(y_2\) are linearly independent.
Uploaded by: Fani Warraich
Correct Answer Logic:
Expanding using binomial theorem, the sum eliminates odd-powered terms of \(\sqrt{x^3-1}\). Collecting coefficients: \(\alpha=2, \beta=10, \gamma=10, \delta=2\). Solving \(2u+10v=18\) and \(10u+2v=20\) gives \(u=\frac{8}{6}, v=\frac{14}{6}\)... yielding \(u+v=5\).
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