What is the name accorded to the type of pollination that takes place in self-incompatible plants?

Options

A. Autogamy
B. Xenogamy
C. Geitonogamy
D. Allogamy

Explanation

To solve the question regarding the type of pollination that occurs in self-incompatible plants, we need to analyze the options provided and understand the definitions of each type of pollination.

### Step-by-Step Solution:

1. **Understanding Self-Incompatibility**:
- Self-incompatible plants are those that cannot fertilize themselves. This means that the pollen from the same plant cannot successfully fertilize its own ovules.

2. **Identifying Pollination Types**:
- The question provides four options:
- A) Autogamy
- B) Xenogamy
- C) GT-nogamy
- D) Allogamy

3. **Defining Each Option**:
- **Autogamy**: This is self-pollination where pollen from the same flower fertilizes its own ovules. This does not occur in self-incompatible plants.
- **Xenogamy**: This refers to cross-pollination where pollen is transferred from the anther of one plant to the stigma of another plant. This is common in self-incompatible plants.
- **GT-nogamy**: This term is not commonly used in the context of pollination and may be a typographical error or a less recognized term.
- **Allogamy**: This is also a term for cross-pollination, similar to xenogamy, but it is less specific about the genetic differences between the plants.

4. **Conclusion**:
- Since self-incompatible plants require pollen from a different plant to achieve fertilization, the correct type of pollination that occurs in these plants is **Xenogamy** (Option B).

### Final Answer:
The type of pollination that takes place in self-incompatible plants is called **Xenogamy**.