In cockroach, foregut comprises of

Options

A. Pharynx, oesophagus, crop and gizzard
B. Mesenteron, crop and gizzard
C. ileum, colon and rectum
D. Pharynx, oesophagus and rectum

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the components of the foregut in a cockroach. The foregut is the first part of the alimentary canal.

2. **Identifying the Parts of the Alimentary Canal**: The alimentary canal of a cockroach is divided into three main parts:
- Foregut
- Midgut
- Hindgut

3. **Components of the Foregut**: The foregut consists of:
- **Pharynx**: The initial part that connects the mouth to the esophagus.
- **Esophagus**: A long tubular structure that follows the pharynx.
- **Crop**: A sac-like structure that stores food.
- **Gizzard**: A muscular structure with chitinous teeth that grinds the food.

4. **Analyzing the Options**:
- **Option A**: Pharynx, esophagus, crop, and gizzard - This is correct as all these parts are components of the foregut.
- **Option B**: Mesentron, crop, and gizzard - Incorrect because mesentron is part of the midgut.
- **Option C**: Ileum, colon, and rectum - Incorrect as these are parts of the hindgut.
- **Option D**: Pharynx, esophagus, and rectum - Incorrect because rectum is part of the hindgut.

5. **Conclusion**: The correct answer is **Option A**: Pharynx, esophagus, crop, and gizzard.

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