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
[{'content': 'Pralidoxime is not useful in poisoning with: \nSelect and explain. \nA. Edrophonium, B. Malathion, C. Parathion, D. DFP', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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.', 'role': 'assistant'}]