AIIMS 2016 Biology Question Paper for free online practice with solutions

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Question : 49 of 60

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

If both assertion and reason are true and reason is the correct explanationof assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.

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