Which of the following is incorrect regarding vasectomy?

Options

A. No sperm occurs in seminal fluid
B. No sperm occurs in epididymis
C. Vasa deferentia is cut and tied
D. Irreversible sterility

Answer

### Step-by-Step Solution:

1. **Understanding Vasectomy**:
- Vasectomy is a surgical procedure performed on males for permanent contraception. It involves cutting and sealing the vas deferens (also known as vasa differentia), which are the tubes that carry sperm from the epididymis to the urethra.

2. **Analyzing the Statements**:
- The question asks which statement regarding vasectomy is incorrect. The statements provided are:
- No sperm occur in the seminal fluids.
- No sperm occur in the epididymis.
- Vasa differentia is cut and tied.
- Irreversible sterility occurs.

3. **Evaluating Each Statement**:
- **Statement 1**: "No sperm occur in the seminal fluids."
- This is correct after vasectomy because the sperm cannot reach the seminal fluid due to the cut in the vas deferens.
- **Statement 2**: "No sperm occur in the epididymis."
- This is incorrect. Sperm are still present in the epididymis at the time of the vasectomy. The procedure does not remove sperm from the epididymis; it only prevents them from being released into the seminal fluid.
- **Statement 3**: "Vasa differentia is cut and tied."
- This is correct as this is the main action performed during a vasectomy.
- **Statement 4**: "Irreversible sterility occurs."
- This is also correct because the cutting and tying of the vas deferens lead to permanent infertility.

4. **Conclusion**:
- The incorrect statement regarding vasectomy is: "No sperm occur in the epididymis." This is because sperm are still present in the epididymis at the time of the procedure.

### Final Answer:
The incorrect statement regarding vasectomy is: **"No sperm occur in the epididymis."**

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