This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'Thyroid follicles are lined by which type of epithelium \nSelect and explain. \nA. Squamous, B. Cuboidal, C. Transitional, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: During active phase the lining of the follicles is columnar,while in resting phase,it is cuboidal. REFERENCE:BDC VOL-3,FIFTH EDITION', 'role': 'assistant'}]