This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Which of the following is an alkaloid \nSelect and explain. \nA. Morphine, B. Neostigmine, C. Emetine, D. Atropine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Neostigmine, sold under the brand name Prostigmin among others, is a medication used to treat myasthenia gravis, Ogilvie syndrome, and urinary retention without the presence of a blockage. It is also used together with atropine to end the effects of neuromuscular blocking medication of the non-depolarizing type. Refer 7/105', 'role': 'assistant'}]