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: Surgery
[{'content': 'The only reason for operating in case thyroiditisis ? \nSelect and explain. \nA. To prevent cancerous degeneration, B. For relief of pain in neck and ear, C. To overcome pressure on trachea or oesophagus, D. To cure the toxic reaction', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e. To overcome pressure on trachea or oesophagus", 'role': 'assistant'}]