The double nerve cord in cockroach is present on the

Options

A. vental side
B. dorsal side
C. above the heart
D. along the side line

Answer

### Step-by-Step Solution:

1. **Understanding the Structure of the Cockroach**:
- The cockroach is classified under the phylum Arthropoda. It is important to know that arthropods have a specific arrangement of their nervous system.

2. **Identifying the Nerve Cord**:
- In cockroaches, the nerve cord is described as "double." This means that instead of a single nerve cord, there are two parallel cords.

3. **Location of the Nerve Cord**:
- The question asks for the location of the double nerve cord in cockroaches. It is crucial to know where this structure is situated in relation to the body.

4. **Options Analysis**:
- **Option A: Ventral Side** - This is the underside of the cockroach.
- **Option B: Dorsal Side** - This is the upper side of the cockroach.
- **Option C: Above the Heart** - This is a specific location but does not accurately describe the general position of the nerve cord.
- **Option D: Along the Side Line** - This could refer to the lateral sides but is not the correct anatomical position for the nerve cord.

5. **Conclusion**:
- Based on the anatomical structure of the cockroach, the double nerve cord is located on the **ventral side** of the body. Therefore, the correct answer is **Option A: Ventral Side**.

### Final Answer:
The double nerve cord in cockroach is present on the **ventral side**.

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