This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': "Koenen's tumor are seen in ? \nSelect and explain. \nA. Neurofibromatosis, B. Tuberous sclerosis, C. Struge weber syndrome, D. Tuberculosis", 'role': 'user'}, {'content': "Answer: B \nExplanation: Koenen tumors, or periungual and subungual fibromas, are a benign, cutaneous manifestation of tuberous sclerosis. They are disfiguring, painful, and challenging to treat as they frequently recur . Koenen's tumor is a cutaneous condition that results in fifty percent of tuberous sclerosis cases. Ref - Davidson 23rd edition pg 838", 'role': 'assistant'}]