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': 'Creative kinase is elevated in MI after - \nSelect and explain. \nA. 2 - 4 hrs, B. 4 - 8 hrs, C. 12 - 24 hrs, D. > 24 hrs', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 2 - 4 hrs.", 'role': 'assistant'}]