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': "All of the following are true regarding Grave's disease except: March 2008 \nSelect and explain. \nA. Orbital proptosis, B. Presents as primary thyrotoxicosis, C. Anti-TPO antibodies, D. Pretibial myxoedema", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: Anti-TPO antibodies', 'role': 'assistant'}]