This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Irreversible cell Injury/Necrosis, Subject name: Pathology
[{'content': 'Metastatic calcification is commonly seen in all of the following, except: \nSelect and explain. \nA. Lungs, B. Kidneys, C. Gastric mucosa, D. Cardiac valves', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Dystrophic calcification is seen in cardiac valves (calcific valvular disease). Metastatic calcification principally affects interstitial tissues of: Gastric mucosa Kidneys Lungs Systemic aeries Pulmonary veins The common feature of all these sites, which makes them prone to calcification is that they can lose acid and therefore they have an internal alkaline component orable for metastatic calcification.', 'role': 'assistant'}]