Which one is not a reflex action ?

Options

A. Closing the eye lids suddenly
B. Release of saliva
C. Obeying the order
D. Pupilary constriction

Answer

To determine which option is not a reflex action, we need to analyze each given option based on the definition of reflex actions.

### Step-by-Step Solution:

1. **Understanding Reflex Actions**:
- Reflex actions are defined as sudden and involuntary movements that occur without conscious thought. They are typically controlled by the spinal cord and do not involve higher brain functions or memory.

2. **Analyzing the Options**:
- **Closing of the eyelids suddenly**: This is a reflex action. It occurs involuntarily when something approaches the eye, protecting it from potential harm.
- **Releasing of saliva**: This can also be considered a reflex action, especially in response to the sight or smell of food. It is an involuntary response.
- **Obeying the order**: This is not a reflex action. It involves conscious thought and decision-making, which are functions of the brain. This action is voluntary and requires cognitive processing.
- **Pupillary constriction**: This is a reflex action. The pupil constricts involuntarily in response to bright light to protect the retina.

3. **Identifying the Correct Answer**:
- Among the options provided, "obeying the order" is the only action that is not a reflex action. It requires conscious thought and is controlled by the brain rather than the spinal cord.

### Conclusion:
The correct answer is **"obeying the order"**, as it is not a reflex action.

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