Head of cockraoch is

Options

A. Triangular
B. Hypognathous
C. Formed by fusion of six segments
D. All of these

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the characteristics of the head of a cockroach. We need to identify its shape, structural formation, and orientation.

2. **Identifying the Shape**: The head of the cockroach is described as being triangular in shape. This is an important characteristic that helps differentiate it from other insects.

3. **Understanding Hyponathous Condition**: The term "hyponathus" refers to the orientation of the head. In cockroaches, the head is bent at right angles to the longitudinal axis of the body. This means that the head is positioned downward relative to the rest of the body.

4. **Segment Fusion**: The head of the cockroach is formed by the fusion of six segments. This is a significant anatomical feature, as it indicates how the head is constructed from multiple parts.

5. **Evaluating the Options**: The options provided in the question are:
- A) Triangular
- B) Hyponathous
- C) Formed by fusion of six segments
- D) All of these

Since all statements about the head of the cockroach are correct, the answer is option D) All of these.

6. **Conclusion**: Therefore, the head of the cockroach is triangular, hyponathous, and formed by the fusion of six segments, making option D the correct answer.