Which one of the following statements is wrong

Options

A. Vegetative cell is larger than generative cell
B. Pollen grains in some plants remain viable for months
C. Intine is made up of cellulose and pectin
D. When pollen is shed at two-called stage, double fertilization does not take place

Explanation

To solve the question "Which one of the following statements is wrong?", we need to analyze each of the provided statements regarding pollen grains and their characteristics.

### Step-by-Step Solution:

1. **Statement Analysis**:
- **Statement A**: "Vegetative cell is larger than generative cell."
- The vegetative cell is indeed larger than the generative cell. The generative cell is smaller and eventually divides to form two sperm cells. This statement is **correct**.

2. **Statement B**: "Pollen grains in some plants remain viable for months."
- This statement is true as some pollen grains can remain viable for extended periods, especially when stored in conditions like liquid nitrogen. This statement is **correct**.

3. **Statement C**: "Entine is made up of cellulose and pectin."
- Entine, which is the inner layer of the pollen wall, is indeed composed of cellulose and pectin. This statement is **correct**.

4. **Statement D**: "When pollen is shed at two cell stage, double fertilization does not take place."
- This statement is incorrect. In many angiosperms, pollen grains are shed at the two-celled stage, but they develop further on the stigma to form a three-celled stage that participates in double fertilization. Therefore, this statement is **wrong**.

### Conclusion:
The wrong statement among the options given is **Statement D**: "When pollen is shed at two cell stage, double fertilization does not take place."

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