Read the following text and answer the following questions on the basis of the same:
A typical anther is bilobed. It is a tetragonal structure consisting of four microsporangia. These microsporangia form pollen sac which on maturity gets filled with a pollen grains. Pollen grains represent the male gametophytes, their cell wall is very hard. Pollen grains of many species cause severe allergies which cause various diseases in human beings.
The prominent pollen grain aperture called germ pore is present in

Options

A. Exine
B. Intine
C. Vegetative cell
D. Generative cell

Explanation

To answer the question regarding the prominent pollen grain aperture called the germ pore, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of Pollen Grain**:
- A pollen grain consists of two layers: the outer layer called the exine and the inner layer called the intine. The exine is known for its toughness and protective qualities.

2. **Identifying the Cells in Pollen Grain**:
- Pollen grains contain two types of cells: the larger vegetative cell and the smaller generative cell. The vegetative cell is responsible for forming the pollen tube, while the generative cell divides to form two male gametes.

3. **Locating the Germ Pore**:
- The germ pore is a specific aperture present in the exine of the pollen grain. This is where the pollen tube will emerge during the process of fertilization.

4. **Analyzing the Options**:
- The question provides four options regarding where the germ pore is located:
- A) Exine
- B) Intine
- C) Vegetative cell
- D) Generative cell

5. **Evaluating Each Option**:
- **Option A (Exine)**: Correct. The germ pore is located in the exine.
- **Option B (Intine)**: Incorrect. The intine does not have a germ pore.
- **Option C (Vegetative cell)**: Incorrect. The vegetative cell does not contain the germ pore; it forms the pollen tube.
- **Option D (Generative cell)**: Incorrect. The generative cell forms male gametes and does not have the germ pore.

6. **Conclusion**:
- The correct answer is **A) Exine**, as the germ pore is present in the exine of the pollen grain.