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
Fastest acting proton pump inhibitor is 
Select and explain. 
A. Rabeprazole, B. Lansoprazole, C. Tenatoprazole, D. Esomeprazole
A: Rabeprazole
Answer: A: Rabeprazole 
Explanation: Rabeprazole is the fastest acting proton pump inhibitor.