Which one of the following overrides the others? O Living will
O Organ donor card
O Durable power of attorney
O Physician's orders

O. Living will.

Explanation:

A living will is a will made by a person stating his/ her choice of care or medication if or when the person becomes so sick and unable to communicate. In simple terms, it is a statement or directive written by a person stating his/ her desire on what type of medication or care he/she must be given when the person gets too sick and dying.

These types of will are written by individuals to give instructions or wishes to be carried out regarding end-of-life medical care and treatments that must be administered to that person. And as such, living will override other authorization papers such as organ donor cards, physician's directives, or even the power of attorneys.

Thus, the correct answer is the first option.