This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Physiology
[{'content': 'Restrictive lung diseases show: \nSelect and explain. \nA. Decreased TLC, B. Decreased RV, C. Decreased VC, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Restrictive lung diseases: it is extra pulmonary,paranchymal or pleural diseases which causes difficulty in expansion of the lung Ref: G K Pal Textbook of Practical Physiology 4th edition page number:165', 'role': 'assistant'}]