Direction: For the given Assertion (A) and Reason (R), select the correct alternative: A: As of November 2026, there is no approved vaccine for AIDS. R: The AIDS virus changes its genetic code.
Question and options
Direction: For the given Assertion (A) and Reason (R), select the correct alternative:
A: As of November 2026, there is no approved vaccine for AIDS.
R: The AIDS virus changes its genetic code.
A: As of November 2026, there is no approved vaccine for AIDS.
R: The AIDS virus changes its genetic code.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true, but R is not the correct explanation of A
- A is true but R is false
- A is false but R is true
Answer and explanation
Correct answer: A - Both A and R are true and R is the correct explanation of A
As of November 2026 no vaccine against HIV/AIDS has been approved; candidates are still in clinical trials (A true). HIV mutates rapidly through error-prone reverse transcription, constantly changing its surface antigens (R true), and this is the main reason a vaccine has been so hard to make. So R explains A.
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CUSAT CAT Integrated IPR Ph.D.
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