This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pathology
[{'content': 'Lymphatic spread is the most common route in which of the following thyroid carcinoma \nSelect and explain. \nA. Papillary, B. Follicular, C. Medullary, D. Anaplastic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lymphatic spread is commonest route for spreading of Papillary carcinoma and least for Follicular carcinoma.', 'role': 'assistant'}]