This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
[{'content': 'In Hanup&;s disease ..... is excreted in the urine \nSelect and explain. \nA. Ornithine, B. Glycine, C. Tryptophan, D. Phenylalanine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hanups disease is an autosomal recessive disease. Absorption of aromatic amino acids, as well as reabsorption from renal tubular, are defective. So amino acids are tryptophan excreted in urine.pellagra-like symptoms due to niacin derived from tryptophan. Diagnosis: ober Meyer test (based on aminoaciduria)Ref: DM Vasudevan - Textbook of Biochemistry for Medical Students, 7th edition, page no: 242', 'role': 'assistant'}]