This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Radiology
[{'content': 'Which of the following is a nonhereditary phakomatoses? \nSelect and explain. \nA. Neurofibromatosis, B. Sturge Weber syndrome, C. Tuberous sclerosis, D. Ataxia telangiectasia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans BStruge Weber syndrome is the only acquired phakomatosis. Rest all major phakomatosis are inherited and most of them like NF1, NF2,Tuberous sclerosis are autosomal dominant while ataxia telengectasia is autosomal recessive.', 'role': 'assistant'}]