One of the legal methods of birth control is

Options

A. By abstaining from coitus from day 10 to 17 of the menstrual cycle
B. By having coitus at the time of the day break
C. By a premature ejaculation during coitus
D. Abortion by taking an appropriate medicine.

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for one of the legal methods of birth control. This implies that we need to identify a method that is recognized and permitted by law.

2. **Identifying Legal Methods of Birth Control**: There are various methods of birth control, but the focus here is on those that are legal. One such method is the "Periodic Abstinence" method.

3. **Explaining Periodic Abstinence**: This method involves couples avoiding sexual intercourse during specific days of the menstrual cycle. The critical days to avoid are typically from day 10 to day 17 of the cycle.

4. **Reason for Avoiding Intercourse**: The reason for this avoidance is that during these days, there is a higher likelihood of ovulation, which means the chances of fertilization are increased. By abstaining from sexual intercourse during this period, couples can effectively reduce the risk of unintended pregnancy.

5. **Conclusion**: Therefore, the legal method of birth control being referred to in the question is abstaining from coitus from day 10 to 16 of the menstrual cycle.

6. **Final Answer**: The correct answer is option A: "by abstaining from coitus from day 10 to 16 of the menstrual cycle."

---