A: Maximum chances of failure in Rhythm method of contraception.
R: Very few women have absolutely regular cycles.

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 and Reason**: The assertion states that there are maximum chances of failure in the Rhythm method of contraception, while the reason given is that very few women have absolutely regular menstrual cycles.

2. **Definition of the Rhythm Method**: The Rhythm method, also known as periodic abstinence, is a natural contraceptive method that relies on tracking the menstrual cycle to avoid intercourse during the ovulation period when a woman is most fertile.

3. **Menstrual Cycle Knowledge**: For the Rhythm method to be effective, a woman must have knowledge of her menstrual cycle, which typically lasts between 28 to 29 days. This knowledge helps in identifying the fertile window.

4. **Challenges in Implementation**: Many women may not have regular menstrual cycles due to various factors such as health issues, stress, or hormonal imbalances. This irregularity makes it difficult to accurately predict ovulation.

5. **Conclusion on Assertion and Reason**: Given that the Rhythm method relies heavily on the regularity of menstrual cycles, the assertion that there are maximum chances of failure is valid. The reason provided, stating that very few women have absolutely regular cycles, supports this assertion.

6. **Final Evaluation**: Both the assertion and the reason are true, and the reason correctly explains why the assertion is true. Therefore, the correct conclusion is that both the assertion and reason are true, with the reason being a correct explanation of the assertion.