The events in pollen- pistil interaction includes all, except

Options

A. Pollen deposition on the stigma until pollen tubes reach the ovary.
B. Release of pollen from one flower to the formation of pollen tubes.
C. Pollen deposition on the stigma until the formation of pollen tubes.
D. Pollen deposition on the stigma intil pollen tubes the ovule

Answer

To solve the question regarding the events in pollen-pistil interaction, we need to analyze each option provided and determine which one does not belong to the process of pollen-pistil interaction.

### Step-by-Step Solution:

1. **Understanding Pollen-Pistil Interaction**:
- Pollen-pistil interaction refers to the series of events that occur after pollen grains land on the stigma of a flower. This interaction is crucial for fertilization as it involves the growth of pollen tubes that transport sperm cells to the ovule.

2. **Analyzing Each Option**:
- **Option 1**: "Pollen deposition on the stigma until pollen tubes reach the ovary."
- This is a part of the pollen-pistil interaction as it describes the process leading to fertilization.
- **Option 2**: "Release of pollen from one flower to the formation of pollen tubes."
- This option describes the process of pollen release, which is not part of the pollen-pistil interaction itself. The interaction begins after pollen has landed on the stigma.
- **Option 3**: "Pollen deposition on the stigma until the formation of pollen tubes."
- This is indeed part of the pollen-pistil interaction as it describes the acceptance and growth of the pollen tube.
- **Option 4**: "Pollen deposition on the stigma until the pollen tube reaches the ovule."
- This is also a part of the pollen-pistil interaction as it describes the final stages of pollen tube growth leading to fertilization.

3. **Identifying the Correct Answer**:
- Based on the analysis, **Option 2** is the only statement that does not describe an event in pollen-pistil interaction. It refers to pollen release, which occurs before the interaction begins.

### Final Answer:
The correct answer is **Option 2: Release of pollen from one flower to the formation of pollen tubes**.