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
[{'content': 'A 24 years old farm worker is rushed to, a nearby emergency department after an accidental exposure to parathion. Which of the following drugs can be given to increase the activity of his acetyl cholinesterase: \nSelect and explain. \nA. Atropine, B. Dimercaprol, C. Physostigmine, D. Pralidoxime', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]