Monothecous and basifixed anthers occur in :

Options

A. tomato
B. onion
C. cotton
D. pea

Explanation

To determine which plant has monothecous and basifixed anthers, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Monothecus Anther**: This type of anther has a single lobe or cavity.
- **Basifixed Anther**: This type of anther is attached to the filament at its base.

2. **Analyze the Options**:
- The options provided are:
- A) Tomato
- B) Onions
- C) Cotton
- D) Pea Plant

3. **Identify Characteristics of Each Plant**:
- **Tomato**: Typically has dithecus anthers (two lobes).
- **Onions**: Also have dithecus anthers.
- **Cotton**: Known to have monothecus and basifixed anthers.
- **Pea Plant**: Generally has dithecus anthers.

4. **Conclusion**:
- After analyzing the characteristics of the anthers in each plant, we find that only **Cotton** exhibits both monothecus and basifixed anthers.

5. **Final Answer**:
- The correct answer is **C) Cotton**.