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
About first order kinetics true statement is: 
Select and explain. 
A. Clearance remains constant, B. Fixed amount of the drug is eliminated, C. Half life increase with dose, D. Decreased clearance with increasing dose
A: Clearance remains constant
Answer: A: Clearance remains constant 
Explanation: None