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': 'During the cardiac cycle the opening of the aoic valve takes place at the : \nSelect and explain. \nA. Beginning of systole, B. End of isovolumetric contraction, C. End of diastole, D. End of diastasis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. End of isovolumetric contraction', 'role': 'assistant'}]