Occurs over the objections of the patient or their surrogate.

a. voluntary euthanasia
b. nonvoluntary euthanasia
c. involuntary euthanasia
d. active euthanasia

The answer is (c) involuntary euthanasia.

From the options given, the best option to answer the question is (C) involuntary euthanasia.

Involuntary euthanasia differs from voluntary and non-voluntary euthanasia, in that voluntary euthanasia is requested by the individual who is suffering from a terminal disease or refuses to have severe medical treatments for the rest of his or her life, while non-voluntary euthanasia is done to someone who cannot make their wishes known (whether or not she or he would rather live or die) such as someone in a coma.