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': 'Neostigmine used in treatment of myasthenia gravis acts by: \nSelect and explain. \nA. Increasing the number of receptors for acetylcholine, B. Increasing synthesis of acetylcholine, C. Decreasing breakdown of acetylcholine, D. Increasing actylcholine degradation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]