Which vessel directly supplies the heart muscle with blood?

A. The aorta
B. The pulmonary artery
C. The coronary artery
D. The pulmonary vein

C

This question asked the name of the vessel that directly supplies the heart with blood. Thanks to all the G2 comments received, it was realized that the correct answer could be C (the coronary artery) or D (the pulmonary artery) so both of these answers were accepted as correct. Most candidates indicated D as correct and a large number chose C. A surprisingly large number of candidates chose A (the aorta).