It seems that the Ethics questions can be a bit tricky on the NBME, so i thought I'd post a couple from a Kaplan book I have.
An unconscious man is brought to the ED for a MVA hemorrhaging profusely, hypotensive and stuporous. You have never met him and no one at your institution knows him. He is wearing a t-shirt that says, "Kiss me, I'm a Jehovah's Witness".
What should you do about the blood transfusion?
a) Give the blood
b) Wait for him to awaken enough to sign consent
c) Wait for the family
d) Seek a court order
e) Give IV fluids alone