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': 'Most common nerve pressed by an enlarged left atrium is - \nSelect and explain. \nA. Phrenic nerve, B. External laryngeal nerve, C. Recurrent laryngeal nerve, D. Sympathetic nerve', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Enlarged left atrium causes left sided recurrent laryngeal nerve paralysis.', 'role': 'assistant'}]