Unwanted pregnancy can be avoided by using different methods. There are surgical methods like vasectomy and tubectomy. Tubectomy is the method in which the fallopian tubes in the females are cut and then sealed or tied. This prevents the fertilisation of egg and sperm as there is no ovum present in the site for fertilisation.
Vasectomy is the method in which the vasa deferens in the males are cut and then sealed or tied. This prevents the release of sperms and transfer to the female reproductive system.
Medical termination of pregnancy (MTP) is the method which helps to remove the foetus from the uterus of the mother before completion of the gestation period. This is also known as induced abortion. Thus, the correct answer is option D.