Two ganglionated solid ventral nerve cords of cockroch originate from 

Options

A. tritocerebrum
B. protocerebrum
C. sub oesophageal ganglion
D. `1^(st)` abdominal ganglion

Answer

To answer the question "Two ganglionated solid ventral nerve cords of cockroach originate from," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Nervous System of Cockroach**:
- The nervous system of a cockroach consists of a brain and a ventral nerve cord. The brain is made up of ganglia.

2. **Identify the Components of the Brain**:
- The cockroach's brain comprises three parts: the supraesophageal ganglion, the subesophageal ganglion, and the circumesophageal connectives.

3. **Recognize the Structure of the Ventral Nerve Cord**:
- The ventral nerve cord is a double structure that runs along the belly (ventral side) of the cockroach. It is made up of ganglia that coordinate the functions of the organism.

4. **Locate the Origin of the Ventral Nerve Cords**:
- The double ventral nerve cord originates from the subesophageal ganglion. This ganglion is crucial as it connects to the nerve cords that extend throughout the body.

5. **Conclude the Answer**:
- Therefore, the two ganglionated solid ventral nerve cords of the cockroach originate from the **subesophageal ganglion**.

### Final Answer:
The two ganglionated solid ventral nerve cords of the cockroach originate from the **subesophageal ganglion**.