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
Drugs used in treatment of organophosporus poisoning are all except: 
Select and explain. 
A. Sodium bicarbonate, B. Naloxone, C. Atropine, D. Activated charcoal
B: Naloxone
Answer: B: Naloxone 
Explanation: None