This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'True about metastatic calcification is \nSelect and explain. \nA. Calcium level is normal, B. Occurs in dead and dying tissue, C. Occurs in damaged hea valve, D. Mitochondria involved earliest', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ref, Robbins 8/e p38;7/e p41-42,9/e p65', 'role': 'assistant'}]