Xenogamy is

Options

A. (a) Autogamy
B. (b) Cross Pollination
C. (c) Self pollination
D. (d) Cleistogamy

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Xenogamy":**
- First, we need to define what xenogamy means. Xenogamy refers to a type of pollination where pollen is transferred from the anther of one flower to the stigma of another flower of a different plant.

2. **Identifying the Options:**
- The question provides four options:
- A) Autogamy
- B) Cross-pollination
- C) Self-pollination
- D) Clistogamy

3. **Analyzing Each Option:**
- **Option A: Autogamy** - This is a type of self-pollination where pollen from the same flower fertilizes its ovules. This does not fit the definition of xenogamy.
- **Option B: Cross-pollination** - This involves the transfer of pollen from one plant to another, which aligns with the definition of xenogamy.
- **Option C: Self-pollination** - Similar to autogamy, this involves pollen fertilizing ovules within the same plant, which is not xenogamy.
- **Option D: Clistogamy** - This is a form of self-pollination where flowers do not open, thus preventing cross-pollination. This also does not describe xenogamy.

4. **Conclusion:**
- After analyzing the options, we can conclude that xenogamy is best described as cross-pollination. Therefore, the correct answer is **Option B: Cross-pollination**.