The ventral diaphragm of cockroach is present in between

Options

A. Thorax and abdomen
B. Pericardial and perivisceral sinuses
C. perivisceral and Perineural sinuses
D. Pericardial and Perineural sinuses

Answer

To solve the question regarding the location of the ventral diaphragm in a cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Cockroach**:
- The cockroach has a segmented body divided into three main parts: the head, thorax, and abdomen. Additionally, it has various internal structures, including sinuses.

2. **Identify the Sinuses**:
- The cockroach has several sinuses, including the perineural sinus, perivisceral sinus, pericardial sinus, and peripheral sinus. Understanding these sinuses is crucial to locating the ventral diaphragm.

3. **Locate the Ventral Diaphragm**:
- The ventral diaphragm is a structure that separates different body cavities. According to the information provided, the ventral diaphragm is specifically located between the perineural sinus and the perivisceral sinus.

4. **Analyze the Options**:
- The question provides multiple options regarding where the ventral diaphragm is located.
- The correct answer is "between the perineural sinus and the perivisceral sinus."

5. **Eliminate Incorrect Options**:
- Other options, such as those suggesting the diaphragm is located between thorax and abdomen, or between pericardial and perivisceral sinus, can be eliminated as they do not accurately describe the position of the ventral diaphragm.

### Final Answer:
The ventral diaphragm of the cockroach is present between the perineural sinus and the perivisceral sinus.