This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Right coronary artery arises from which sinus: 
Select and explain. 
A. Right aortic, B. Left  aortic, C. Coronary sinus, D. Anterior aortic sinus
D: Anterior aortic sinus
Answer: D: Anterior aortic sinus 
Explanation: Right coronary artery
origin: Left posterior aortic sinus of aorta
Supplies :
a)  Right  atrium
 b)  right  ventricle  except  area adjoining  anterior  inter  ventricular  groove.
 c) small part of left  atrium
Left Coronary Artery
Origin:  left  posterior  aortic  sinus  of ascending aorta.
Supplies:
a) Left  atrium
b) left  ventricle except area adjoining posterior  inter  ventricular  groove 
c)  small  part  of right ventricle.