This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'Maximum blood flow to Coronaries occur during? \nSelect and explain. \nA. Early pa of systole, B. Systole proper, C. Early pa of diastole, D. Diastole proper', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In each cardiac cycle 80% cbf occurs during diastole and the remaining 20% of cbf occurs during systole. Ref: page no363 Textbook of physiology Volume 1 AK Jain 7th edition', 'role': 'assistant'}]