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: Skin
[{'content': 'Child with h/o hypopigmented macule on back, infantile spasm and delayed milestone has \nSelect and explain. \nA. NF, B. Sturge weber syndrome, C. Tuberous sclerosis, D. Nevus anemicus.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Tuberous sclerosis', 'role': 'assistant'}]