This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid Gland, Subject name: Surgery
[{'content': 'Best prognosis of all thyroid cancers: \nSelect and explain. \nA. Papillary, B. Follicular, C. Medullary, D. Anaplastic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Papillary cancer(Refer Bailey and Love 27th edition, Page 816* Best prognosis - Papillary cancer* Worst prognosis - Anaplastic cancer', 'role': 'assistant'}]