Muscle fibres having rounded ends are
(a) Unstriped muscles
(b) Smooth muscles
(c) Striped muscles
(d) All the above

Options

A. Unstriped muscles
B. Smooth muscles
C. Striped muscles
D. All the above .

Answer

To determine which type of muscle fibers have rounded ends, we can analyze the options provided:

1. **Understanding Muscle Types**:
- **Striated Muscles**: These include skeletal and cardiac muscles. They have a cylindrical shape and exhibit striations (alternating light and dark bands). Due to their cylindrical structure, they have rounded ends.
- **Smooth Muscles**: These are unstriated and have a spindle shape. They do not have rounded ends; instead, they taper at both ends.
- **Unstriped Muscles**: This term is synonymous with smooth muscles, which are also spindle-shaped and lack rounded ends.

2. **Analyzing the Options**:
- **(a) Unstriped muscles**: These are smooth muscles and do not have rounded ends.
- **(b) Smooth muscles**: These are also unstriated and have tapered ends, not rounded.
- **(c) Striped muscles**: This refers to striated muscles, which include both skeletal and cardiac muscles. They have rounded ends due to their cylindrical shape.
- **(d) All the above**: This option suggests that all types of muscle fibers have rounded ends, which is incorrect.

3. **Conclusion**:
Based on the analysis, the correct answer is **(c) Striped muscles**, as they are the only type that has rounded ends.

### Final Answer:
(c) Striped muscles