This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'All the following statements are true about structure of airway except \nSelect and explain. \nA. Maximum smooth muscle is found in respiratory bronchiole, B. Cartilage is absent in terminal bronchiole, C. Secretory glands is present in bronchi, D. Ciliated cuboidal epithelium is found in respiratoy bronchiole', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Smooth muscle is maximum in terminal bronchiole\nCartilage and secretory glands present only in trachea and bronchi\nPseudostratified ciliated columnar epithelium in trachea and bronchi\nCiliated cuboidal epithelium is terminal and respiratory bronchiole.', 'role': 'assistant'}]