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
Which of the following compounds acts as a benzodiazepine antagonist? 
Select and explain. 
A. Flumazenil, B. Naloxone, C. Furazolidone, D. Naltrexone
A: Flumazenil
Answer: A: Flumazenil 
Explanation: None