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: Medicine
[{'content': 'Effect of prolonged oxygen therapy is - \nSelect and explain. \nA. a) Endothelial damage, B. Increased pulmonary compliance, C. Atelectasis, D. Decreased vital capacity', 'role': 'user'}, {'content': 'Answer: C \nExplanation: More severe problems can include: Lung damage.(Atelectasis) Fluid buildup or bursting (rupture) of the middle ear. Sinus damage. Changes in vision, causing nearsightedness, or myopia. Oxygen poisoning, which can cause lung failure, fluid in the lungs, or seizures Ref Davidson 23rd edition pg 545', 'role': 'assistant'}]