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': 'True statement about the paralysis of the recurrent laryngeal nerve is \nSelect and explain. \nA. Common on left side, B. 50% idiopathic, C. Cord will lie laterally, D. Speech therapy given', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Paralysis of recurrent laryngeal nerve common on the left side.\nThe common causes are\n\nBronchogenic cancer\nAccidental trauma\nThyroid surgery\nThyroid disease (benign or malignant)\nCervical lymphadenopathy\nCarcinoma cervical oesophagus\nCarcinoma thoracic oesophagus\nAortic aneurysm\nMediastinal lymphadenopathy', 'role': 'assistant'}]