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
Mechanism of action of cholestyramine is ? 
Select and explain. 
A. Bind to bile acid, B. Decrease HMG-COA, C. Increase excretion of cholesterol, D. Decrease utilization of cholesterol
A: Bind to bile acid
Answer: A: Bind to bile acid 
Explanation: Ans. is 'a' i.e., Bind to bile acid "Chlestyramine is a bile acid sequesterant"