Tongue of cockroach is :

Options

A. labrun
B. hypopharynx
C. labium
D. mandibles

Answer

### Step-by-Step Solution:

1. **Understand the Mouth Parts of a Cockroach**: The mouthparts of a cockroach are specialized for biting and chewing. They consist of several components that work together to help the cockroach feed.

2. **Identify the Components**: The main components of the cockroach's mouthparts include:
- **Labrum**: This is the upper lip of the cockroach.
- **Mandibles**: These are strong jaws that help in cutting, grasping, and crushing food.
- **Maxilla**: These structures assist in manipulating food.
- **Labium**: This is the lower lip of the cockroach.
- **Hypopharynx**: This structure is often referred to as the tongue of the cockroach.

3. **Determine the Function of Each Component**:
- The **labrum** acts as a barrier and helps in holding food.
- The **mandibles** are used for cutting and grinding food.
- The **maxillae** help in handling and tasting food.
- The **labium** aids in the manipulation of food.
- The **hypopharynx** is involved in the ingestion process and is considered the tongue.

4. **Identify the Correct Answer**: Based on the definitions and functions of the components, the hypopharynx is identified as the tongue of the cockroach.

5. **Conclusion**: Therefore, the tongue of a cockroach is the **hypopharynx**.