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
Child with h/o hypopigmented macule on back, infantile spasm and delayed milestone has 
Select and explain. 
A. NF, B. Sturge weber syndrome, C. Tuberous sclerosis, D. Nevus anemicus.
C: Tuberous sclerosis
Answer: C: Tuberous sclerosis 
Explanation: C i.e. Tuberous sclerosis