Head of cockroach is hypognathous beccause 

Options

A. It lies hanging almost right angles to body
B. Posterior wider part is upward
C. Mouth parts are directed upward
D. All the above

Answer

### Step-by-Step Solution:

1. **Understanding Hypognathous**: The term "hypognathous" refers to a head structure that is positioned below the body. In the case of the cockroach, this means that the head is oriented downwards relative to the rest of the body.

2. **Analyzing the Head Position**: When we visualize the cockroach, the head is tilted at an angle that is almost perpendicular (90 degrees) to the body. This positioning is characteristic of hypognathous organisms.

3. **Evaluating the Options**:
- **Option 1**: "It lies hanging almost right angles to the body" - This is correct because the head indeed hangs down at a right angle to the body.
- **Option 2**: "Posterior wide part is upward" - This is incorrect because the posterior part of the cockroach's body does not point upward; instead, it is oriented horizontally.
- **Option 3**: "Mouth parts are directed upward" - This is also incorrect as the mouth parts of the cockroach are directed downward, not upward.

4. **Conclusion**: Based on the analysis, the correct answer is that the head of the cockroach is hypognathous because it lies hanging almost at right angles to the body.

### Final Answer:
The head of the cockroach is hypognathous because it lies hanging almost at right angles to the body.

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