One of the legal methods of birth control is
Abortion by taking an appropriate medicine
By abstaining from coitus from day 10-17 day of the menstrual cycle
By having coitus at the time of daybreak
By a premature ejaculation during coitus
As we hve discussed in Temporary Methods of Birth Control - Natural Methods -
Periodic Abstinence:
Advantages of this method:
Disadvantages of this method:
Unsuitable for females with the irregular menstrual cycle
High chances of failure
Hence, the correct option is (b).