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
Flumazenil is used for reversing the respiratory depression caused by which one of the following drugs? 
Select and explain. 
A. Fentanyl, B. Midazolam, C. Propofol, D. Ketamine
B: Midazolam
Answer: B: Midazolam 
Explanation: None