Assertion :The process of fusion of a sperm with an ovum is called fertilisation. Reason: Only one sperm can fertilise an ovum.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Fertilization is the process of fusion of a sperm with an ovum. The union of sperm and egg results in the formation of zygote or fertilized egg. In humans, it usually occurs in the fallopian tube. Usually, one sperm fertilizes the ovum. However, there are chances of more than one sperm fertilizing with an ovum. The phenomenon is called as polyspermy.
Thus, the correct answer is 'Assertion is correct but reason is incorrect.'

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