Anatomy All of the following are true about coronary aery except: A Right coronary aery lies in right anterior coronary sulcus B Left anterior descending aey is a branch of left coronary aery C Usually 3 obtuse marginal aeries arise from left coronary aery D In 85% cases posterior descending interventri-cular aery arises from right co. a. 💡 Explanation All of the following are true about coronary aery except: ✓ Correct Answer: C. Usually 3 obtuse marginal aeries arise from left coronary aery