Assertion : Stigma of pistil receives the pollen during pollination .
Reason : Pollen grains are produced in ovary of gynoecium .

Options

A. If both Assertion and Reason are the true and Reason is correct explanation of Assertion .
B. If both Assertion and Reason ar ture but Reason is not correct explanation of Assertion .
C. If Assertion is true but Reason is false .
D. If both Assertion and Reason are false .

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that "the stigma of the pistil receives the pollen during pollination." This is a true statement. The stigma is the part of the pistil that is responsible for receiving pollen grains during the process of pollination.

2. **Understanding the Reason**: The reason given is "pollen grains are produced in the ovary of gynoecium." This statement is false. Pollen grains are actually produced in the anthers, which are part of the stamen (the male reproductive part of a flower), not in the ovary of the gynoecium.

3. **Evaluating the Options**:
- The first option states that both the assertion and reason are true, and the reason is the correct explanation of the assertion. This is incorrect because the reason is false.
- The second option states that both assertion and reason are true, but the reason is not the correct explanation of the assertion. This is also incorrect because the reason is false.
- The third option states that the assertion is true but the reason is false. This is correct since the assertion is true and the reason is false.
- The fourth option states that both assertion and reason are false. This is incorrect because the assertion is true.

4. **Conclusion**: The correct answer is that the assertion is true, but the reason is false. Therefore, the correct option is option 3.