$A-$Vasectomy, $B-$Tubectomy, $C-$Vas deferens cut and tied, $D-$Fallopian tube cut and tied.

Surgical Method of Contraception (sterilization)

There are terminal and the permanant methods, which blocks the transport of gametes by preventing conception.

They are two types

Vasectomy In males a small portion of the vas deferens is removed or tied up through a small incision on the scrotum called vasectomy Tubectomy In females a small part of the Fallopian tube is removed or tied up through a small incision in the abdomen called tubectomy