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': 'Total thyroid lobectomy on affected side, with conservation of 1-2 gm of thyroid tissue on contralateral side to preserve parathyroid glands, is known as: \nSelect and explain. \nA. Sub total thyroidectomy., B. Near total thyroidectomy., C. Total thyroidectomy., D. Hemithyroidectomy.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]