This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid Tumor, Subject name: Pathology
[{'content': 'Most common type of thyroid cancer is: \nSelect and explain. \nA. Papillary carcinoma, B. Follicular carcinoma, C. Anaplastic carcinoma, D. Medullary carcinoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Thyroid carcinomas in order of prevalence: Papillary carcinoma (> 85% cases)- most common type of thyroid cancer. Follicular carcinoma (5%-15% cases) Medullary carcinoma (5% cases) Anaplastic carcinoma (<5% cases)', 'role': 'assistant'}]