In cockroach, ootheca is produced by secretion of -
(a) Collateral glands
(b) Conglobate gland
(c) Mushroom glands
(d) Gynatrium

Options

A. Colleterial glands
B. Conglobate gland
C. Mushroom glands
D. Gynatrium

Answer

To solve the question regarding which gland in cockroaches produces the ootheca, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which gland in cockroaches is responsible for the secretion of ootheca, which is the egg case that contains fertilized eggs.

2. **Identify the Options**: The options given are:
- (a) Collateral glands
- (b) Conglobate gland
- (c) Mushroom glands
- (d) Gynatrium

3. **Recall the Function of Each Gland**:
- **Collateral Glands**: These glands are known to secrete substances that form the protective casing around the fertilized eggs in cockroaches.
- **Conglobate Gland**: This gland does not have a known role in the production of ootheca.
- **Mushroom Glands**: These glands are associated with the reproductive system but do not produce ootheca.
- **Gynatrium**: This is related to the female reproductive system but is not directly responsible for ootheca secretion.

4. **Determine the Correct Answer**: Based on the function of the collateral glands, which are known to secrete the material that forms the ootheca, we can conclude that the correct answer is:
- **(a) Collateral glands**

5. **Final Answer**: The ootheca in cockroaches is produced by the secretion of the collateral glands.