The correct options are
A Transplantation is required when an organ has failed by a disease.
C A portion of the lung can be donated when a person is alive.
D Organ transplant is a surgical procedure.
∙ In the organ transplantation, the working organ is surgically removed from the donor and transplanted to another person.
∙ An individual requires organ transplantation when their organ has been damaged due to an injury, or has been failed by a disease.
∙ Corneas, heart, pancreas, intestines, etc., are donated to the recipient after the donor is declared brain dead.
∙ While some organs such as kidney, a part of liver, tissues, lungs can be donated when a person is alive.