The test (s) based on the principle of toxin neutralization is/are

The test (s) based on the principle of toxin neutralization is/are

Q. The test (s) based on the principle of toxin neutralization is/are

A.            Nagler’s reaction

B.            Schick test

C.            both (a) and (b)

D.            none of these

Answer: both (a) and (b)

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