Which structure is known as lower lip of cockroach ?

Options

A. Labrum
B. Labium
C. Mantum
D. Submentum

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks for the structure known as the lower lip of a cockroach.

2. **Recall the Anatomy of Cockroach**: In the anatomy of a cockroach, there are several mouthparts that serve different functions.

3. **Identify the Lower Lip**: Among these mouthparts, the structure that is specifically referred to as the lower lip is called the **labium**.

4. **Confirm the Answer**: Therefore, the answer to the question is that the lower lip of the cockroach is known as the **labium**.

5. **Additional Information**: For further understanding, other mouthparts include the **labrum** (upper lip), **mandibles** (teeth for grinding food), and **hypopharynx** (tongue-like structure).

### Final Answer:
The structure known as the lower lip of the cockroach is called the **labium**.

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