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': 'In body pethysmography, a person is asked to expire against a closed glottis. What will be the change in the pressure in the lung and the box \nSelect and explain. \nA. Increase in both, B. Decrease n both, C. Increase in lung decrease in box, D. Decrease in lung increase in box', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]