Which of the following is not a relfex action ?

Options

A. Salivation
B. Sweating
C. Withdrawal of hand when pinched by needle
D. None of these

Explanation

To determine which of the following is not a reflex action, we need to first understand what a reflex action is. A reflex action is an involuntary and nearly instantaneous movement in response to a stimulus.

### Step-by-Step Solution:

1. **Define Reflex Action**: Reflex actions are automatic responses to stimuli that do not require conscious thought. They are controlled by the nervous system and occur quickly to protect the body from harm.

2. **Analyze Each Option**:
- **Salivation**: This is a reflex action. It occurs in response to the sight or smell of food, which stimulates the salivary glands to produce saliva involuntarily.
- **Sweating**: This is not classified as a reflex action. Sweating is a physiological response to help regulate body temperature, and while it is involuntary, it is not a direct response to a specific stimulus like the other options.
- **Withdrawal of Hand When Pinched by a Needle**: This is a classic example of a reflex action. The stimulus (pinching) causes an immediate withdrawal response to protect the body from pain.

3. **Conclusion**: Based on the analysis, the action that is not a reflex action is **sweating**.

### Final Answer:
The option that is not a reflex action is **sweating**.

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