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': 'Most common inherited cause of Aplastic anemia \nSelect and explain. \nA. Idiopathic, B. Fanconi anemia, C. Scwachman - diamond syndrome, D. Down syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: M/C acquired cause - Idiopataic.\nM/C inherited - Fanconi anemia.', 'role': 'assistant'}]