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: ENT
[{'content': "A common indication of septoplasty - \nSelect and explain. \nA. DNS with symptoms, B. Anosmia, C. Sluder's neuralgia, D. Septal spur", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]