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: Medicine
[{'content': 'Aspartate aminotransferase is released \nSelect and explain. \nA. by viable cells, B. after cell necrosis, C. either of the two, D. none of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]