This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Because free ammonia in the blood is toxic to the body, it is transpoed in which of the following non-toxic forms? \nSelect and explain. \nA. Histidine and urea, B. Phenylalanine and methionine, C. Glutamine and urea, D. Lysine and glutamine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Glutamine and urea Ref: Ganong - Review of Medical Physiology 23rd Ed Page 644', 'role': 'assistant'}]