The correct option is B Dialysis
Dialysis of kidneys is a process in which the blood is purified with the help of machine. It is done when the Kidneys fail to perform their function of filtering blood and balancing electrolytes and fluid concentration. Due to this, Dialysis is also referred as Artificial Kidneys. Transplantation is a process in which a damaged organ is replaced by the healthy one. And filteration and diffusion are process that occurs in kidneys as well as other cells of the body.