Pollen grain receptor in gynoecium is-

Options

A. Ovary
B. Style
C. Stigma
D. Thalamus

Answer

To answer the question about the pollen grain receptor in the gynoecium, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Gynoecium**:
- The gynoecium is the female reproductive part of a flower, composed of one or more carpels. Each carpel consists of three main parts: the stigma, style, and ovary.

2. **Identifying the Parts of the Carpel**:
- **Stigma**: This is the topmost part of the carpel that receives pollen grains.
- **Style**: This is the elongated structure that connects the stigma to the ovary.
- **Ovary**: This is the swollen base of the carpel that contains ovules.

3. **Role of the Stigma**:
- The stigma serves as the landing platform for pollen grains. When pollen is transferred to the stigma (a process known as pollination), it germinates and grows down the style to reach the ovary.

4. **Conclusion**:
- Since the stigma is the part of the gynoecium that directly receives the pollen grains, it is identified as the pollen grain receptor.

### Final Answer:
The pollen grain receptor in the gynoecium is the **stigma**.

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