Which one of the system of man is affected by the bite of cobra snake ?

Options

A. Digestive system
B. Nervous system
C. Excretory system
D. Circulatory system

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which system in the human body is affected by the bite of a cobra snake.

2. **Identifying the Venom Composition**: Cobra snake venom primarily contains neurotoxins. Neurotoxins are substances that can harm or disrupt the function of nerve cells.

3. **Analyzing the Effects of Neurotoxins**: Neurotoxins work by blocking nerve transmission. This means they can interfere with both motor (movement) and sensory (feeling) nerve functions in the body.

4. **Connecting the Effects to Body Systems**: Since the neurotoxins specifically target nerve cells, it is clear that the system affected by the cobra snake bite is the nervous system.

5. **Eliminating Other Options**:
- The digestive system is not primarily affected by cobra venom.
- The excretory system does not have a direct impact from neurotoxins.
- The circulatory system may be affected indirectly, but the primary target of the venom is the nervous system.

6. **Conclusion**: Therefore, the system of man that is affected by the bite of a cobra snake is the **nervous system**.

**Final Answer**: The nervous system (Option B).

---