Which of the following is not an internal sex organ of a female ?

Options

A. Fallopian tube
B. Ovary
C. Uterus
D. vulva

Answer

To determine which of the following is not an internal sex organ of a female, we need to analyze the options provided.

1. **Fallopian Tube**: The fallopian tubes are internal structures that connect the ovaries to the uterus. They play a crucial role in the transport of the ovum from the ovary to the uterus and are considered internal sex organs.

2. **Ovary**: The ovaries are also internal organs. They are responsible for producing eggs (ova) and hormones such as estrogen and progesterone. Therefore, they are classified as internal sex organs.

3. **Uterus**: The uterus is another internal organ. It is where a fertilized egg implants and develops during pregnancy. Thus, the uterus is also an internal sex organ.

4. **Vulva**: The vulva is the external part of the female genitalia. It includes structures such as the clitoris, labia minora, labia majora, and the vaginal opening. Since the vulva is located outside the body, it is not considered an internal sex organ.

Based on this analysis, the correct answer to the question "Which of the following is not an internal sex organ of a female?" is **Vulva**.

### Final Answer:
**Vulva** is not an internal sex organ of a female.