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
Dose of Warfarin is managed by: March 2007 
Select and explain. 
A. INR, B. ESR, C. MAC, D. PAH
A: INR
Answer: A: INR 
Explanation: Ans. A: INR