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': 'Which of the following properties make pyridostigmine different from neostigmine ? \nSelect and explain. \nA. It is more potent, B. It is longer acting, C. It produces less muscarinic side effects, D. It does not have any direct action on NM receptors', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Though less potent than Neostigmine, Pyridostigmine has longer duration of action (3 to 6 hrs)\nDuration of action of neostigmine is 0.5 to 2 hrs.', 'role': 'assistant'}]