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
A drug that compete for active binding site is called: 
Select and explain. 
A. Competitive inhibitor, B. Non–competitive inhibitor, C. Covalent inhibitor, D. Any of these
A: Competitive inhibitor
Answer: A: Competitive inhibitor 
Explanation: None