<prompt> All of the following are true about coronary artery except -Right coronary artery lies in right anterior coronary sulcusLeft anterior descending artery is a branch of left coronary arteryUsually 3 obtuse marginal arteries arise from left coronary arteryIn 85 cases posterior descending interventricular artery arises from right coronary artery  <response>: From the left coronary artery, only a single obtuse marginal artery arises. 