Pollen prepotency is defined as

Options

A. (1) Preference for foreign pollen
B. Bud pollination
C. Self sterility
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding Pollen Prepotency**: Pollen prepotency refers to a phenomenon in flowering plants where foreign pollen grains (from a different plant) germinate more quickly than the pollen grains from the same plant (self-pollen).

2. **Analyzing the Options**:
- **Option A: Preference for foreign pollen**: This aligns with the definition of pollen prepotency, as it indicates that the plant shows a preference for pollen from other plants.
- **Option B: Bud pollination**: This is a different process where pollination occurs before the flower opens, and it does not relate to the concept of pollen prepotency.
- **Option C: Self sterility**: This refers to a condition where a plant cannot fertilize itself, which is not the same as pollen prepotency.
- **Option D: All of these**: Since not all the options are correct, this cannot be the right answer.

3. **Conclusion**: Based on the definitions and analysis of the options, the correct answer to the question "Pollen prepotency is defined as" is **Option A: Preference for foreign pollen**.