Stomata which remain surrounded by a pair of subsidiary cells whose common wall is at right angles to guard cells are called

Options

A. (a) anomocytic
B. (b) anisocytic
C. (c) paracytic
D. (d) diacytic

Explanation

To solve the question regarding the type of stomata that are surrounded by a pair of subsidiary cells whose common wall is at right angles to the guard cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Stomata**: Stomata are small openings on the surface of leaves that facilitate gas exchange. They are surrounded by guard cells that regulate their opening and closing.

2. **Identifying Subsidiary Cells**: In some types of stomata, there are additional cells known as subsidiary cells that assist in the function of the guard cells.

3. **Analyzing the Orientation**: The question specifies that the common wall of the subsidiary cells is at right angles to the guard cells. This orientation is crucial for identifying the type of stomata.

4. **Types of Stomata**: The options provided include:
- A) Anomosytic stomata
- B) Anisocytic stomata
- C) Parasitic stomata
- D) Diacytic stomata

5. **Identifying the Correct Type**: Among the options, diacytic stomata are characterized by having subsidiary cells that are positioned at right angles to the guard cells.

6. **Conclusion**: Based on the characteristics described, the correct answer to the question is **D) Diacytic stomata**.

### Final Statement:
Thus, the stomata which remain surrounded by a pair of subsidiary cells whose common wall is at right angles to the guard cells are called **diacytic stomata**.

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