All of the following are true about coronary aery except:
C i.e. Usually 3 obtuse marginal aeries arise form left coronary aery
Right coronary aery lies in right anterior coronary sulcus
Left anterior descending aey is a branch of left coronary aery
Usually 3 obtuse marginal aeries arise from left coronary aery
In 85% cases posterior descending interventri-cular aery arises from right co. a.