This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': "Which of the following is found in urine in Hanup's disease patients? \nSelect and explain. \nA. Phenyalanine, B. Ornithine, C. Cystine, D. None", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hanup disease is inherited as an autosomal recessive trait. Heterozygotes are normal. Consanguinity is common.', 'role': 'assistant'}]