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: Pathology
[{'content': 'Approximate time, at the end of which the quantity, of ATP within ischemic cardiac myocytes is reduced to 10% of original is - \nSelect and explain. \nA. <2 minutes, B. 10 minutes, C. 20 minutes, D. 40 minutes', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., 40 minutes", 'role': 'assistant'}]