Discussion
Assertion (A) : Information from persons testing positive for HIV at the (ICTCs) Integrated Counselling and Testing Centres across the country during 2011-12 shows that 88.2% of HIV infections are transmitted through heterosexual route of transmission.
Reason (R) : Sexual mode of transmission is the most efficient mode of HIV transmission.
Answer: C
The assertion is true but the reason is false, so the answer is the third code. ICTC data show that most HIV infections are acquired by heterosexual contact. But the sexual route is not the most efficient mode of transmission per exposure; blood transfusion carries over 90 percent risk per exposure, and mother-to-child transmission and needle sharing are more efficient per exposure than sexual contact. The sexual route dominates by number of cases, not by efficiency.
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