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': 'More resistance in expiration is due to: \nSelect and explain. \nA. Increased compression of airway, B. Due to change from linear to turbulent flow, C. Saturation with moisture, D. Increased rate of flow during expiration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Increased compression of airways', 'role': 'assistant'}]