This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inborn Errors of Metabolism, Subject name: Pediatrics
In Hartnup disorder what is seen? 
Select and explain. 
A. Pellagra like rash, B. Burn feet rash, C. Alopecia, D. Vitiligo
A: Pellagra like rash
Answer: A: Pellagra like rash 
Explanation: a. Pellagra like rash(Ref: Nelson's 20/e p 648-649)Clinical Features of Hartnup Disorder:Most children with hartnup defect remain asymptomaticIn symptomatic patients cutaneous photosensitivity and pellagra-like rash on sun exposureSome patients may have intermittent ataxia manifested as an unsteady, wide-based gait