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': 'Eye signs can be seen in : \nSelect and explain. \nA. Primary toxic goitre., B. Secondary toxic goitre., C. Thyrotoxicosis., D. All of the above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Toxic goitres are broadly of two distinct types: Primary & Secondary.', 'role': 'assistant'}]