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: Forensic Medicine
Pralidoxime is not useful in poisoning with: 
Select and explain. 
A. Edrophonium, B. Malathion, C. Parathion, D. DFP
A: Edrophonium
Answer: A: Edrophonium 
Explanation: A i.e. Edrophonium Cholinesterase re-activators as pralidoxime (PAM) is ineffective as antidote to anti-cholinesterase poisoning with carbamates as - Physo / Pyrido /Neo - stigmine, Ambenonium & EdrophoniumQ.