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Assertion (A) : In Absorption-Inhibition method, specific absorption is allowed to proceed by placing antigenic material in contact with its homologous antibody.

Reason (R) : This absorption renders the serum less potent, and the inhibition of its activity is measured.
Codes :

  • A.(A) is correct but (R) is incorrect.
  • B.(A) is incorrect but (R) is correct.
  • C.Both (A) and (R) are correct.
  • D.Both (A) and (R) are incorrect.

Answer: C

Both statements are correct: Both (A) and (R) are correct.

In the absorption-inhibition method a known antiserum is allowed to absorb the antigen being tested, by placing the antigenic material in contact with its homologous antibody (A). If the antigen matches, the antibody is used up, so the serum becomes less potent, and the loss of its activity is measured (R).

The options that call either statement incorrect are therefore wrong.

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