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
Which of the following is found in urine in Hanup's disease patients? 
Select and explain. 
A. Phenyalanine, B. Ornithine, C. Cystine, D. None
D: None
Answer: D: None 
Explanation: Hanup disease is inherited as an autosomal recessive trait. Heterozygotes are normal. Consanguinity is common.