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: Anaesthesia
[{'content': 'To counter central anticholinergic effect, drug used is: \nSelect and explain. \nA. Physostigmine, B. Atropine, C. Neostigmine, D. Hyoscine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Physostigmine', 'role': 'assistant'}]