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
False about competitive antagonism 
Select and explain. 
A. Cusve shifts to right, B. Efficacy decreases, C. Reversible, D. Drug binds to active site of the enzyme
B: Efficacy decreases
Answer: B: Efficacy decreases 
Explanation: Efficacy remains same.