Correct option is A
(A) Passive euthanasia — (IV): The doctor withholds or withdraws treatment by permitting the patient to die naturally, on the request of the patient.
(B) Voluntary active euthanasia — (I): The doctor ends a suffering of a patient's life at his/her request by administering a lethal dose of drug.
(C) Assisted suicide — (II): The doctor helps the patient take his/her life by enabling the patient to swallow or inject a lethal dose of drug.
(D) Involuntary active euthanasia — (III): The doctor ends a suffering of a patient by administering a lethal dose of drug without the patient’s consent or permission.