Assertion: Copper-T is an effective contraceptive device in human females.
Reason: Copper-T prevents passage of sperms from vagina upwards into Fallopian tubes.

Options

A. If both Assertion cord Reason are true and Reason is correct explanation of Assertion
B. If both Assertion and Reason are true but Reason is not correct explanation of Assertion
C. If Assertion is true but Reason is false.
D. If both Assertion and Renson are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Copper-T is an effective contraceptive device in human females."
- **Explanation**: Copper-T is a type of intrauterine device (IUD) that is used to prevent pregnancy. It is known for its effectiveness in contraception.

2. **Understanding the Reason**: The reason provided is that "Copper-T prevents the passage of sperms from the vagina upwards into the Fallopian tubes."
- **Explanation**: Copper-T works by releasing copper ions, which create an environment that is toxic to sperm. This prevents sperm from moving through the cervix and into the uterus and Fallopian tubes, thereby reducing the chances of fertilization.

3. **Evaluating the Relationship**: We need to determine if the reason is a correct explanation of the assertion.
- **Explanation**: Since the reason accurately describes how Copper-T functions to prevent pregnancy, it serves as a correct explanation for why the assertion is true.

4. **Conclusion**: Both the assertion and the reason are true, and the reason correctly explains the assertion.
- **Final Statement**: Therefore, the correct option is that both assertion and reason are true, and the reason is a correct explanation of the assertion.