The soma of unipolar neuron is found in 

Options

A. dorsal root ganglion
B. ventral root ganglion
C. visceral ganglion
D. collateral ganglion

Answer

### Step-by-Step Solution

1. **Understanding Unipolar Neurons**:
- Unipolar neurons are a type of sensory neuron characterized by having a single axon that extends from the cell body (soma). They typically have receptors that detect sensory stimuli and are located in various parts of the body, including the skin, joints, muscles, and internal organs.

2. **Identifying the Location of the Soma**:
- The soma of a unipolar neuron is found in the dorsal root ganglion. The dorsal root ganglion is a cluster of cell bodies located in the dorsal root of a spinal nerve.

3. **Examining the Options**:
- **Option A: Dorsal Root Ganglion**: This is where the cell bodies of sensory neurons are located, making it the correct answer.
- **Option B: Ventral Root Ganglion**: This contains the axons of multipolar motor neurons, not sensory neurons.
- **Option C: Visceral Ganglion**: This is related to visceral motor neurons and does not contain unipolar neuron somas.
- **Option D: Co-lateral Ganglion**: This is associated with axon collaterals and does not pertain to the location of unipolar neuron somas.

4. **Conclusion**:
- Based on the information provided, the correct answer is **Dorsal Root Ganglion**, as it contains the somas of unipolar sensory neurons.

### Final Answer:
The soma of unipolar neuron is found in **Dorsal Root Ganglion**.

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