Right coronary artery arises from which sinus:

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.