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: Physiology
[{'content': 'The only inducible urinary buffer is \nSelect and explain. \nA. Bicarbonate, B. Phosphate, C. Ammonia, D. Plasma proteins', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ammonia is only inducible buffer\n\nIt is an extracellular buffer', 'role': 'assistant'}]