The papilllary muscles are helpful in `:-`

Options

A. Movement of eye balls
B. Movement of eye lids
C. Closing `&` opening the valves of heart
D. Movement of pinnae

Answer

### Step-by-Step Solution:

1. **Understanding Papillary Muscles**:
- Papillary muscles are located in the ventricles of the heart. They play a crucial role in the functioning of the heart valves.

2. **Analyzing the Options**:
- **Movement of Eyeballs**: This is incorrect because the movement of eyeballs is controlled by the oculomotor muscles, not papillary muscles.
- **Movement of Eyelids**: This option is also incorrect as the movement of eyelids is facilitated by the same oculomotor muscles.
- **Closing and Opening the Valves of the Heart**: This is the correct option. Papillary muscles are attached to the atrioventricular valves (the mitral and tricuspid valves) via chordae tendineae. When the ventricles contract, the papillary muscles pull on the chordae tendineae, preventing the valves from inverting and thus helping to close the valves.
- **Movement of Pinna**: This is incorrect because the movement of the pinna (the outer ear) is controlled by auriculotemporal muscles, not papillary muscles.

3. **Conclusion**:
- The correct answer is that papillary muscles are helpful in **closing and opening the valves of the heart**.