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: Medicine
[{'content': 'Extraparenchymal causes of respiratory failure include (s) \nSelect and explain. \nA. Cervical spine trauma, B. Pneumothorax, C. Bronchial obstruction, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Causes of Type 1 respiratory failure are : Acute asthma, pulmonary oedema, pneumonia, pneumothorax, ARDS, COPD, lung fibrosis, right to left shunts etc treatment: treat cause and high flow oxygen Causes of type 2 respiratory failure are : Acute severe asthma, Acute exacerbation of COPD, upper airway obstruction, Narcotic drugs, sleep apnoea, kyphoscoliosis, ankylosing spondylitis. Treatment: treat cause and low flow oxygen. Reference : Davidson, 23rd Edition, page no : 565.', 'role': 'assistant'}]