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Assertion : IgM is a type of immunoglobu...

Assertion : IgM is a type of immunoglobulin which cannot cross the placenta.
Reason : IgM is pentamer immunoglobulin, joined by J-chain.

A

if both are ture with reason being corect explanation

B

both true but reason is not correct explanation

C

assertion true but reason is wrong

D

both are wrong

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