Assertion: Autogamy is a transfer of pollen grains from an anther to the stigma of the same flower on the same plant.
Reason: Xenogamy is pollination between two flowers on different plants.

Both Assertion (A) and reason (R) are correct  but R is not the correct explanation of A.

The correct answer is Option (2) →  Both Assertion (A) and Reason (R) are correct, but R is not the correct explanation of A.

Explanation:

Assertion (A) is correct:

• Autogamy is a type of self-pollination, where pollen grains from the anther are transferred to the stigma of the same flower.

Reason (R) is also correct:

• Xenogamy is a type of cross-pollination where pollen is transferred between flowers of different plants of the same species.

However, Reason (R) is not the explanation for Assertion (A):

• The definition of xenogamy does not explain autogamy.
• To explain autogamy, a correct reason would be:
• "Autogamy ensures reproductive success even in the absence of pollinators and maintains genetic purity."

Final Answer:

Both Assertion (A) and Reason (R) are correct, but R is not the correct explanation of A.