This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Secreting active thyroid follicles are lined by \nSelect and explain. \nA. Columnar, B. Cuboidal, C. Squamous, D. Pseudo stratified squamous', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Thyroid follicles lining epithelium depends upon the secretion of thyroxine More the secretion,more the endoplasmic reticulum,more the height of the cell, becoming columnar. Resting follicle - Squamous Normal follicle - Cuboidal Active follicle - Columnar Ref: IB Singh textbook of histology 6e pg 325.', 'role': 'assistant'}]