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
[{'content': 'The symptoms of dietary deficiency of niacin (which results in pellagra) will be less severe if the diet has a high content of: \nSelect and explain. \nA. Tryptophan, B. Tyrosine, C. Thymine, D. Thiamine', 'role': 'user'}, {'content': "Answer: A \nExplanation: a. Tryptophan(Ref: Nelson's 20/e p 325, Ghai 8/e p 118)Tryptophan can be converted to nicotinamide adenine dinucleotide (NAD) 60mg tryptophan gives rise to 1mg niacin.", 'role': 'assistant'}]