This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic histology, Subject name: Anatomy
[{'content': 'Pneumocytes are present in ? \nSelect and explain. \nA. Trachea, B. Bronchus, C. Bronchioles, D. Alveolus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Type 1 Pneumocyte helps in gaseous exchange. Type 2 Pneumocytes helps in production of surfactant.', 'role': 'assistant'}]