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Which of the following is NOT a route of transmission of HIV?
ATransfusion of contaminated blood
BUse of contaminated needles or syringes
CCasual touch or physical contact with a patient
DFrom an infected mother to her child through the placenta
Answer & Solution
Correct answer: C. Casual touch or physical contact with a patient
1. HIV spreads through body fluids and blood, by sexual contact, contaminated needles, infected blood transfusion, and mother to child.
2. The text states clearly that HIV is not transmitted by touch or physical contact.
3. Options A, B and D are all valid routes, so they are not the exception.
4. Hence the answer is C.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Health and Diseases", p.317_
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