This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Pediatrics
A 6-year-old girl on a predominantly maize based diet presents with history of recurrent diarrhea, dermatitis with rashes involving the neck area is seen in: 
Select and explain. 
A. Pellagra, B. Tyrosinemia, C. Phenylketonuria, D. Albinism
A: Pellagra
Answer: A: Pellagra 
Explanation: a. Pellagra(Ref: Nelson's 20/e p 324-326, Ghai 8/e p 118-119)Maize based diet predisposes to Niacin deficiency, which gives rise to Pellagra.