Which is not a set of secondary sex organs ?

Options

A. Epididymis, Seminal Vesicle, Penis
B. Uterus, Vagina, Fallopian tube
C. Prostate, Bulbourethral gland, Vasdeferens
D. Fallopian tube, Ovary, Penis, Vagina

Answer

To determine which option does not consist of secondary sex organs, we need to first identify the primary and secondary sex organs in human reproduction.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Primary Sex Organs**: These are the organs directly involved in reproduction. In males, the primary sex organs are the testes, and in females, they are the ovaries.
- **Secondary Sex Organs**: These are the organs that assist in reproduction but are not directly involved in the production of gametes. They include structures such as the penis, vagina, uterus, seminal vesicles, and prostate.

2. **Review the Options**:
- The options given are:
1. Epididymis, seminal vesicles, penis
2. Uterus, vagina, fallopian tube
3. Prostate, bulbous urethra, vas deferens
4. Fallopian tube, ovary, penis, vagina

3. **Analyze Each Option**:
- **Option 1**: Epididymis, seminal vesicles, penis - All these are secondary sex organs.
- **Option 2**: Uterus, vagina, fallopian tube - All these are secondary sex organs.
- **Option 3**: Prostate, bulbous urethra, vas deferens - All these are secondary sex organs.
- **Option 4**: Fallopian tube, ovary, penis, vagina - Here, the ovary is a primary sex organ, while the others are secondary.

4. **Identify the Incorrect Set**:
- Since the fourth option contains the ovary, which is a primary sex organ, it does not consist solely of secondary sex organs.

5. **Conclusion**:
- The correct answer to the question "Which is not a set of secondary sex organs?" is **Option 4: Fallopian tube, ovary, penis, vagina**.

### Final Answer:
**Option 4: Fallopian tube, ovary, penis, vagina** is not a set of secondary sex organs.

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