At which stage of \(HIV\) infection does one usually show symptoms of \(AIDS\) ?

A Within \(15\) days of sexual contact with an infected person
B When the infected retro virus enters host cells
C When \(HIV\) damages large number of helper \(T\) - lymphocytes
D When the viral \(DNA\) is produced by reverse transcriptase

Verified Solution

Answer & Solution

Correct Answer

(C) When \(HIV\) damages large number of helper \(T\) - lymphocytes

Step-by-step Solution

Detailed explanation

(c) : \(AIDS\) is a disorder of cellmediated immune system of the body. Virus responsible for \(AIDS\) is \(HIV\) (Human immunodeficiency virus). There is a reduction in the number of helper \(T\)-cells which stimulate antibody production by Bcells. This results in the loss of natural defence against viral infection.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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