Capacitation of of sperm occurs in:

Options

A. rate testis
B. epididymis
C. vas deferens
D. female reproductive tract'

Explanation

### Step-by-Step Solution:

1. **Understanding Capacitation**:
- Capacitation is a physiological process that sperm undergo to gain the ability to fertilize an egg. This involves changes in the sperm's membrane and motility.

2. **Location of Capacitation**:
- Capacitation occurs after sperm are released from the male reproductive system. Specifically, it happens in the female reproductive tract.

3. **Process of Capacitation**:
- Once sperm are deposited in the female reproductive tract, they undergo biochemical changes that prepare them for the fertilization of the egg. This includes alterations in the sperm's membrane and increased motility.

4. **Conclusion**:
- Therefore, capacitation occurs in the female reproductive tract, which is the correct answer to the question.

### Final Answer:
Capacitation of sperm occurs in the female reproductive tract.

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