Which of the following is an example for conditioned reflex?

Options

A. cycling
B. withdrawal of hand on touching a hot plate
C. watering of mouth at the smell of food
D. flowing of tears while cutting onions

Answer

To determine which of the options provided is an example of a conditioned reflex, let's analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Conditioned Reflexes**:
- A conditioned reflex is a learned response to a stimulus that occurs through experience or training. It is not innate and develops over time.

2. **Analyzing the Options**:
- **Option A: Cycling**:
- Cycling requires practice and learning. When a person learns to ride a bicycle, they develop a conditioned reflex to balance and pedal. This is an example of a conditioned reflex because it is acquired through experience.

- **Option B: Withdrawal of hand on touching a hot plate**:
- This reflex is innate and occurs automatically without prior learning. It is an unconditioned reflex, as even a baby will instinctively withdraw their hand from a hot surface.

- **Option C: Watering of mouth at the smell of food**:
- This response can occur without prior learning, as it is a natural reaction to food stimuli. Thus, it is also an unconditioned reflex.

- **Option D: Flowing of tears while cutting onions**:
- This reaction is a natural response to the irritants released from onions and does not require prior conditioning. Therefore, it is an unconditioned reflex as well.

3. **Conclusion**:
- After analyzing all options, the only example of a conditioned reflex is **Option A: Cycling**. This is because it involves a learned response developed through practice and experience.

### Final Answer:
**The correct answer is Option A: Cycling.**

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