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
[{'content': 'Anterior pa of interventricular septum is supplied by - \nSelect and explain. \nA. Right coronary aery, B. Left coronary aery, C. Posterior descending coronary aery, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Anterior 2/3rd of septum is supplied by LCA and posterior 1/3rd is by RCA', 'role': 'assistant'}]