A Met with an Accident and Became Unconscious

Multiple Choice

A met with an accident and became unconscious. He was taken to the hospital by the police and there was none of identify him. The surgeon performed an operation on him to save him but A died. The police prosecuted the surgeon for murder on a complaint by A's relative. Since it was an act done in:

A) Good faith no offence was committed.
B) Good faith done for the benefit of the deceased, on offence was committed.
C) Good faith and for the benefit of A, and it was impossible to get consent in time, the surgeon is not liable.
D) Saving the life and under professional ethics, he is not liable.