Wilhelm CRoentgen's Discovery of "The X-Ray" Is Regarded as One of of Medicine's

Wilhelm C.Roentgen's discovery of "the x-ray" is regarded as one of medicine's most significant achievements.Although his discovery was accidental,his early research was so thorough that no significant findings have been added to his original theories.This in itself is a true tribute to the brilliance of Roentgen as a scientist.One of the most famous early images he created was an x-ray image of his

A) colon.
B) laboratory assistant's foot.
C) wife's hand.
D) kidneys.