This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors of Nervous System, Subject name: Medicine
[{'content': "Koenen's tumor are seen in? \nSelect and explain. \nA. Neurofibromatosis, B. Tuberous sclerosis, C. Sturge weber syndrome, D. Tuberculosis", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) Tuberous sclerosisRef : Dermatology by Otto Braun falco p 846, Harrison' internal medicine 18/e, chapter 53, p 410", 'role': 'assistant'}]