This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Anaesthesia
[{'content': 'Best indicator of Endotracheal tube Extubation is \nSelect and explain. \nA. Tin box index, B. Minute volume, C. Respiratory rate, D. Negative inspiratory pressure', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (D) Negative inspiratory pressure # Mechanical function indicators of Extubation:1. FEV>10-15 ml/Kg2. Tidal volume >/= 4-6 ml/Kg3. FVC IN 1 SEC >10 ml/KG4. Negative inspiratory force >20 cm H205. Vital capacity >/=15 ml/KG6. Dead space ventilation or tidal volume ratio <0.67. Rapid shallow breating index', 'role': 'assistant'}]