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: Physiology
[{'content': 'Depolarization of human ventricular muscle starts from \nSelect and explain. \nA. Posterobasal part of ventricle, B. Left side of interventricular septum, C. Uppermost portion of interventricular septum, D. Basal portion of ventricle', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Order of depolarization in the heart.\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 First- Left side of the interventricular septum\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Moves to right across the mid portion of the septum\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Apex of heart\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Along ventricular walls to AV groove (Endocardium to epicardium)\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Last- Posterobasal portion of the left ventricle, pulmonary conus, uppermost portion of the septum.', 'role': 'assistant'}]