How many of the following features belong to skeletal muscles?
I. Striped appearance
II. Voluntary nature
III. Not under the control of CNS
IV. Primarily involved in locomotory actions.

Options

A. one
B. two
C. three
D. four

Answer

To determine how many features belong to skeletal muscles, we will evaluate each of the given statements one by one.

### Step-by-Step Solution:

1. **Evaluate Feature I: Striped appearance**
- Skeletal muscles are characterized by a striped or striated appearance due to the regular arrangement of contractile proteins (actin and myosin). This feature is indeed a characteristic of skeletal muscles.
- **Conclusion**: This feature belongs to skeletal muscles. (Correct)

2. **Evaluate Feature II: Voluntary nature**
- Skeletal muscles are under voluntary control, meaning they can be consciously controlled by the brain. This is another defining feature of skeletal muscles.
- **Conclusion**: This feature belongs to skeletal muscles. (Correct)

3. **Evaluate Feature III: Not under the control of CNS**
- This statement is incorrect for skeletal muscles. Skeletal muscles are controlled by the central nervous system (CNS). Therefore, this feature does not belong to skeletal muscles.
- **Conclusion**: This feature does not belong to skeletal muscles. (Incorrect)

4. **Evaluate Feature IV: Primarily involved in locomotory actions**
- Skeletal muscles are primarily responsible for locomotion and movement of the body. This feature is true for skeletal muscles.
- **Conclusion**: This feature belongs to skeletal muscles. (Correct)

### Summary of Features:
- Feature I: Correct
- Feature II: Correct
- Feature III: Incorrect
- Feature IV: Correct

### Final Count:
Three out of the four features belong to skeletal muscles.

### Answer:
**3 features belong to skeletal muscles.**

---