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': 'Ash leaf macules are characteristic of \nSelect and explain. \nA. Von Recklinghausen disease, B. Bournviller disease, C. Von Hipple -Lindau disease, D. Sturge - Weber syndrome', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ash leaf macules are hypopigmental off - white coloured macules 1 - 3 cm in zise.It is seen is tuberous sclerosis (also known as Bournville's disease).", 'role': 'assistant'}]