This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Myocardial Infarction, Subject name: Pathology
[{'content': 'Irreversible change staing in MI in myocardium is seen in: \nSelect and explain. \nA. Few seconds, B. 10 minutes, C. 20 minutes, D. 40 minutes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Change in myocardium in MI:- Few seconds: onset of ATP depletion 10 min : ATP | to 50% 20 min : Irreversible changes stas 40 min', 'role': 'assistant'}]