Assertion: Only one sperm is needed to fertilize an ovum in mammals.
Reason: Multiple sperms entering a single ovum can cause polyspermy, leading to developmental problems.
1
Both assertion and reason are true, and the reason is the correct explanation of the assertion.
2
Both assertion and reason are true, but the reason is not the correct explanation of the assertion
3
Assertion is true, but the reason is false.
4
Assertion is false, but the reason is true.