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': 'Which of the following is not a common site for metastatic calci \nSelect and explain. \nA. Gastric mucosa, B. Kidney, C. Lung, D. Parathyroid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Metastatic calcification\xa0may occur widely throughout the body but principally affects.\n\nInterstitial tissues of gastric mucosa\nKidneys\nLungs\nSystemic arteries and\nPulmonary veins\n\nThe common feature of all these sites, which makes them prone to calcification\xa0is that they can lose acid and\xa0therefore they have an internal alkaline component favourable for metastatic calcification.\nAlso, know\n\nMetastatic calcification\xa0occurs in normal tissues whenever there is hypercalcemia.\nUsually, deposition of the calcium does not cause any clinical dysfunction but sometimes massive deposition in\xa0the lung may produce abnormality and in kidneys may produce nephrocalcinosis.', 'role': 'assistant'}]