Which of the following method of contraception protects a person from acquiring a sexually transmitted disease?

One of the following is not a part of the human male reproductive system. This is :

Which of the following is not a sexually transmitted disease ?

In which one of the following birth control methods, a small portion of oviducts of a woman is removed by surgical operation and the cut ends are ligated ?

One of the following is a surgical method which prevents the sperms from reaching the ovum and pregnancy does not occur. This method is :