Rarely among angiosperms in pollen grains influenced the endosperm this is called as

Options

A. Metaxenia
B. Nemec phenomenon
C. Xenia
D. Mesogamy.

Answer

To solve the question, "Rarely among angiosperms in pollen grains influenced the endosperm this is called as," we need to identify the correct term that describes this phenomenon.

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking about a specific phenomenon where pollen grains influence the endosperm in angiosperms.

2. **Identifying the Options**: The options provided are:
- A) Metaxenia
- B) Limax phenomenon
- C) Xenia
- D) Mitogen

3. **Analyzing Each Option**:
- **Metaxenia**: This term refers to the influence of pollen on the fruit shape and other fruit characteristics, not specifically the endosperm. Thus, it is not the correct answer.
- **Limax Phenomenon**: This term does not relate to the influence of pollen on endosperm or fruit development. Therefore, it is also incorrect.
- **Xenia**: This term is specifically defined as the direct effect of pollen on the seed and fruit characters, including the endosperm. It is the correct term for the phenomenon described in the question.
- **Mitogen**: This term refers to substances that stimulate cell division, which is unrelated to the effects of pollen on endosperm. Hence, it is incorrect.

4. **Conclusion**: Based on the analysis, the correct answer is **C) Xenia**. This term specifically describes the influence of pollen grains on the endosperm in angiosperms.

### Final Answer:
**C) Xenia**