Which of the following is not a reflex action?

Options

A. Blinking of eyes
B. Sneezing on entry of some dust or foreign particles in respiratory system
C. Learning to play guitar
D. Withdrawal of hand on touching some hot object

Explanation

To determine which of the following is not a reflex action, we need to understand what a reflex action is. A reflex action is an automatic and rapid response to a stimulus that occurs without conscious thought. Let's analyze each option:

1. **Blinking of eyes**: This is a reflex action. When something comes close to our eyes or if there is a bright light, our eyes automatically blink to protect themselves.

2. **Sneezing on entry of some dust or foreign particles**: This is also a reflex action. When dust enters our nose, it triggers a sneeze to expel the irritant from our respiratory system.

3. **Learning to play guitar**: This is not a reflex action. Learning to play an instrument involves conscious thought, practice, and skill development. It requires intention and effort over time.

4. **Withdrawal of hand on touching some hot object**: This is a reflex action. When we touch something hot, our body automatically pulls away our hand to prevent injury, without us having to think about it.

Based on this analysis, the option that is not a reflex action is:

**Option 3: Learning to play guitar.**

### Step-by-Step Solution:
1. **Understand the definition of reflex action**: Reflex actions are automatic responses to stimuli that occur without conscious thought.
2. **Analyze each option**:
- **Option 1**: Blinking of eyes - Reflex action.
- **Option 2**: Sneezing due to dust - Reflex action.
- **Option 3**: Learning to play guitar - Not a reflex action.
- **Option 4**: Withdrawal of hand from a hot object - Reflex action.
3. **Identify the correct answer**: The only option that does not fit the definition of a reflex action is option 3.