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: Anaesthesia
[{'content': 'Seen after tracheostomy \nSelect and explain. \nA. Inversion of V/P ratio, B. Increased V/P ratio, C. Decreased in dead space, D. Increased resistance of air flow', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tracheostomy decreases all three :- V/P ratio, dead space, resistance to air flow.', 'role': 'assistant'}]