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
Initial Vmax of an enzyme - substrate interaction is 10 & Km is 5. After adding Drug B Km is 10. Which of the following is false? 
Select and explain. 
A. Drug B is a competitive antagonist, B. Increasing the substrate concentration can reverse the inhibition of Drug B, C. Drug B is structurally similar to substrate, D. Drug B binds to allosteric site of the enzyme
D: Drug B binds to allosteric site of the enzyme
Answer: D: Drug B binds to allosteric site of the enzyme 
Explanation: None