The correct option is
B abcdsqrpContraceptives :
Contraceptives are devices, methods or drugs that help in preventing pregnancy.
Chemical methods :
Chemical contraceptive methods are used along with the barrier method to cover the cervix and prevent the entry of sperms in the uterus. They increase the efficiency of contraception. Examples include spermicidal creams, jellies and foams.
IntraUterine devices (IUDs) :
IntraUterine Devices (IUDs) are devices which are inserted by doctors or expert nurses in the uterus through vagina. They are available in various sizes and shapes. Examples include Cu T, Cu 7, multiload 375, progestasert etc.
Barrier methods :
Barrier contraceptive methods are made of rubber that prevent the physical meeting of sperm and ovum. Examples include condoms, diaphragms, cervical caps etc.
Sterilisation methods :
Sterilization or surgical methods involve sterilization of male or female partners and used as the terminal methods to prevent pregnancies.
It includes vasectomy in males (vas deferens is cut and tied up) and tubectomy in females (fallopian tube is cut and tied up).
Final answer :
d.) a - s, b - q, c - r and d - p