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: Unknown
[{'content': 'Medical treatment of choice in otosclerosis is: \nSelect and explain. \nA. Sodium fluoride, B. anti-histaminics, C. Cinnarazine, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Medical treatment of choice in otosclerosis is sodium fluoride therapy especially in patients with active focus.', 'role': 'assistant'}]