One of the legal methods of birth control is

Options

A. 1.by having coitus at the time of day break
B. 2.by a premature ejaculation during coitus
C. 3.abortion by taking an appropriate medicine
D. 4.by abstaining from coitus from day 10 to 17 of the menstrual cycle

Explanation

To solve the question regarding legal methods of birth control, we will analyze the options provided in the video transcript and identify which method is considered legal.

### Step-by-Step Solution:

1. **Understanding Birth Control Methods**:
- Birth control methods can be classified into legal and illegal methods. Legal methods are those that are approved and regulated by health authorities.

2. **Evaluating the Options**:
- The first method mentioned is having coitus at a time of daybreak. This method is not scientifically supported as a reliable form of birth control.
- The second method is premature ejaculation during coitus. This is also not a reliable or effective method of birth control and does not prevent pregnancy.
- The third method involves abortion by taking inappropriate medicine. This is considered illegal and unsafe, as it can lead to serious health risks and complications.
- The fourth method is abstaining from coitus from day 10 to day 17 of the menstrual cycle. This method is based on the understanding of the ovulation cycle, where avoiding intercourse during the fertile window can prevent pregnancy.

3. **Identifying the Legal Method**:
- Among the options evaluated, the fourth method (abstaining from coitus from day 10 to day 17 of the menstrual cycle) is recognized as a legal and natural method of birth control.

4. **Final Answer**:
- Therefore, the correct answer to the question "One of the legal methods of birth control is" is: **By abstaining from coitus from day 10 to day 17 of the menstrual cycle.**