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': 'Amino acids excreted in the urine in cystinosis \nSelect and explain. \nA. Cystine, B. Ornithine, C. Arginine, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cystinuria is one of the inborn error of metabolism included in Garrod&;s tetrad. It is an autosomal recessive condition. The disorder is attributed to the deficiency in transpo of amino acids. There will be abnormal excretion of cystine and to a lesser extent lysine, ornithine and arginine. Hence the condition is also called cystine-lysuriaRef: DM Vasudevan - Textbook of Biochemistry for Medical Students, 7th edition, page no: 219', 'role': 'assistant'}]