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': 'Average weight of thyroid gland where diet is rich in Iodine is - \nSelect and explain. \nA. 10-12gm, B. 14-16gm, C. 18-20gm, D. 28-30gm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]