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': 'False about competitive antagonism \nSelect and explain. \nA. Cusve shifts to right, B. Efficacy decreases, C. Reversible, D. Drug binds to active site of the enzyme', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Efficacy remains same.', 'role': 'assistant'}]