Find odd one out w.r.t. inborn reflexes

Options

A. Knee jerk
B. Pupillary reflex
C. Salivation on smelling the food
D. Blinking of eyes

Answer

To find the odd one out with respect to inborn reflexes from the given options, we need to analyze each option and determine whether it is an inborn reflex (unconditioned reflex) or an acquired reflex (conditioned reflex).

### Step-by-Step Solution:

1. **Understanding Inborn Reflexes**:
- Inborn reflexes, also known as unconditioned reflexes, are natural responses that do not require learning. They are present at birth and are automatic.

2. **Analyzing Each Option**:
- **A. Knee Jerk Reflex**:
- This is an inborn reflex. It occurs when the patella (kneecap) is tapped, causing the leg to jerk forward. This reflex is automatic and does not require any learning.

- **B. Pupillary Reflex**:
- This is also an inborn reflex. The pupils constrict or dilate in response to light intensity without any need for prior learning.

- **C. Salivation on Smelling Food**:
- This is an acquired reflex. While salivation itself can be an inborn reflex (like when tasting food), the specific response to the smell of food is learned. A newborn does not automatically associate the smell of food with salivation; this connection is developed over time.

- **D. Blinking of Eyes**:
- This is an inborn reflex. The eyes blink automatically when an object approaches them, serving as a protective mechanism.

3. **Identifying the Odd One Out**:
- Based on the analysis, options A, B, and D are all inborn reflexes, while option C (Salivation on Smelling Food) is an acquired reflex. Therefore, option C is the odd one out.

### Conclusion:
The odd one out with respect to inborn reflexes is **C. Salivation on Smelling Food**.

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