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: Pharmacology
[{'content': 'The pharmacokinetics change occurring in geriatric patients is decline in: \nSelect and explain. \nA. Gastric absorption, B. Liver metabolism, C. Renal clearance, D. Hypersensitivity', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]