Which type of mouthpart is present on the lateral side of the pre-oral cavity in cockroach?

Options

A. Labrum and mandibles
B. Mandibles and labium
C. Mandibles and `1^(st)` maxillae
D. Mandibles and hypopharynx

Answer

To solve the question regarding the type of mouthpart present on the lateral side of the pre-oral cavity in a cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Mouthparts of a Cockroach**:
- The mouthparts of a cockroach include several structures: the labrum (upper lip), mandibles, maxillae, and labium (lower lip).

2. **Understand the Structure of the Pre-oral Cavity**:
- The pre-oral cavity is the space in front of the mouth where food is initially taken in. It is bordered by various mouthparts.

3. **Locate the Lateral Side of the Pre-oral Cavity**:
- The lateral sides of the pre-oral cavity refer to the sides of this cavity, which would be occupied by specific mouthparts.

4. **Identify the Mouthparts on the Lateral Side**:
- On the lateral sides of the pre-oral cavity, you will find:
- A pair of **mandibles**: These are strong, jaw-like structures used for grinding food.
- A pair of **maxillae**: These are located next to the mandibles and assist in manipulating food.

5. **Conclusion**:
- Therefore, the types of mouthparts present on the lateral side of the pre-oral cavity in a cockroach are the **mandibles** and **maxillae**.

### Final Answer:
The mouthparts present on the lateral side of the pre-oral cavity in a cockroach are the **mandibles** and **maxillae**.