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': 'All predispose to thrombosis except - \nSelect and explain. \nA. Homocystinuria, B. PNH, C. Polycythemia, D. Hypomagnesemia', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Hypomagnesemia", 'role': 'assistant'}]