The type of pollination involving transfer of pollen grains from anther to the stigma of the same flower is known as

Options

A. geitonogamy
B. xenogamy
C. autogamy
D. apogamy

Explanation

To solve the question regarding the type of pollination involving the transfer of pollen grains from the anther to the stigma of the same flower, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Pollination**:
- There are different types of pollination, which include autogamy, zetonogamy, xenogamy, and apogamy. Each of these terms has a specific definition related to how pollen is transferred.

2. **Analyze the Options**:
- **Zetonogamy**: This involves the transfer of pollen grains from one flower to another flower of the same plant or genetically similar plants. This is not what the question describes.
- **Xenogamy**: This refers to the fertilization that occurs between flowers of different plants. This option also does not fit the description in the question.
- **Autogamy**: This is the process where pollen grains from the anther of a flower fertilize the stigma of the same flower. This matches the description given in the question.
- **Apogamy**: This is a form of reproduction that occurs without the fusion of gametes, often involving vegetative reproduction. This is not relevant to the question.

3. **Identify the Correct Answer**:
- Since autogamy is defined as the transfer of pollen from the anther to the stigma of the same flower, it is the correct answer to the question.

4. **Conclude**:
- The type of pollination involving the transfer of pollen grains from the anther to the stigma of the same flower is known as **autogamy**.

### Final Answer:
The correct answer is **autogamy**.

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