Which of the following is correct match regarding structures and their location in cockroach ?

Options

A. Anal style : `10^(th)` abdominal segment
B. Ovary : `4^(th) - 6^(th)` abdominal segments
C. Testes : `2^(nd) - 6^(th)` abdominal segments
D. Mushroom gland : `6^(th) - 7^(th)` - abdominal segments

Answer

To solve the question regarding the correct match of structures and their locations in a cockroach, we will analyze each option provided and determine their accuracy based on our knowledge of cockroach anatomy.

### Step-by-Step Solution:

1. **Understanding the Structures and Their Locations**:
- We need to identify the structures mentioned in the options and their respective locations in the cockroach.

2. **Analyzing Each Option**:
- **Option 1: Annel style in the 10th abdominal segment**:
- The annel style is a structure found in male cockroaches, specifically located on the 9th abdominal segment, not the 10th. Therefore, this option is **incorrect**.

- **Option 2: Ovary in the 4th to 6th abdominal segment**:
- In female cockroaches, the ovaries are located laterally on the 2nd to 6th abdominal segments. However, they are primarily associated with the 2nd and 3rd segments. Thus, this option is also **incorrect**.

- **Option 3: Testes in the 2nd and 6th abdominal segments**:
- The testes are located laterally in male cockroaches, specifically in the 4th and 6th abdominal segments. Therefore, this option is **incorrect**.

- **Option 4: Mushroom gland in the 6th and 7th abdominal segments**:
- The mushroom gland is an accessory reproductive gland found in male cockroaches, and it is indeed located on the 6th and 7th abdominal segments. This option is **correct**.

3. **Conclusion**:
- After analyzing all the options, the only correct match regarding structures and their location in cockroaches is the mushroom gland located in the 6th and 7th abdominal segments.

### Final Answer:
The correct answer is **Option 4: Mushroom gland present on the 6th and 7th abdominal segments**.

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