Identify the odd one from the following.

Options

A. Labia minora
B. Fimbriae
C. Infundibulum
D. Isthmus

Answer

To identify the odd one out from the given options: labia minora, fimbri, infundibulum, and isthmus, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Options**:
- **Labia Minora**: These are two small folds of skin that are part of the external female genitalia, specifically surrounding the vaginal opening.
- **Fimbri**: These are finger-like projections located at the end of the fallopian tubes, which help in capturing the ovum from the ovary.
- **Infundibulum**: This is the funnel-shaped opening of the fallopian tube that is located near the ovary and is connected to the fimbri.
- **Isthmus**: This is the narrow section of the fallopian tube that connects the ampulla (wider part of the tube) to the uterine cavity.

2. **Categorize the Structures**:
- The **fimbri**, **infundibulum**, and **isthmus** are all parts of the fallopian tubes, which are internal structures involved in the female reproductive system.
- The **labia minora**, on the other hand, is an external structure and is part of the vulva, which is not involved in the internal reproductive processes.

3. **Identify the Odd One Out**:
- Since the labia minora is an external structure while the fimbri, infundibulum, and isthmus are all internal structures of the fallopian tubes, the labia minora is the odd one out.

4. **Conclusion**:
- Therefore, the odd one out from the given options is **labia minora**.