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
The pharmacokinetics change occurring in geriatric patients is decline in: 
Select and explain. 
A. Gastric absorption, B. Liver metabolism, C. Renal clearance, D. Hypersensitivity
C: Renal clearance
Answer: C: Renal clearance 
Explanation: None