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
[{'content': 'A drug that compete for active binding site is called: \nSelect and explain. \nA. Competitive inhibitor, B. Non–competitive inhibitor, C. Covalent inhibitor, D. Any of these', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]