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
Pralidoxime is ineffective in case of which poisoning: 
Select and explain. 
A. Organophosphorous, B. Carbaryl, C. Both of the above, D. None of the above
B: Carbaryl
Answer: B: Carbaryl 
Explanation: Carbaryl