A: Surgical method also called sterilisation are generally advised for the male/female partner as a terminal method to prevent any more pregnancies.
R: These techniques are highly effective but their reversibility is poor.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reasons is not the correct expalanation of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4).

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that surgical methods, referred to as sterilization, are generally recommended for both male and female partners as a permanent method to prevent future pregnancies.
- This is true because sterilization is a permanent form of contraception.

2. **Understanding the Reason (R)**:
- The reason provided is that these techniques are highly effective but have poor reversibility.
- This is also true. Surgical sterilization methods, such as tubectomy for females and vasectomy for males, are designed to be permanent and have a high success rate in preventing pregnancies.

3. **Explaining the Surgical Methods**:
- In females, the surgical procedure is called **tubectomy**, where the fallopian tubes are cut and tied to prevent the egg from meeting the sperm.
- In males, the procedure is called **vasectomy**, where the vas deferens (the tube that carries sperm from the testes) is cut and sealed, preventing sperm from being included in the ejaculate.

4. **Evaluating Effectiveness and Reversibility**:
- Both methods are highly effective in preventing pregnancies, with success rates often exceeding 99%.
- However, the reversibility of these procedures is poor. Once the tubes are cut and sealed, it is very difficult to restore them to their original state, and the chances of successful reversal are low.

5. **Conclusion**:
- Both the assertion and the reason are true, and the reason provides a correct explanation for the assertion. Therefore, the surgical sterilization methods are indeed effective but not easily reversible.