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': 'Klebsiella pneumonia has all of the following characteristics except: \nSelect and explain. \nA. Upper lobes are frequently involved, B. Pneumatocele may occur commonly, C. Empyema is much more common, D. Lung abscess formation is very uncommon', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Klebsiella pneumonia :- is common in alcoholics and immunocompromised patients presents as an upper lobe involvement CT chest shows poorly marginated lowly attenuated areas with and without small air-containing cavities called as pneumatoceles. Pulmonary necrosis, pleural effusion and empyema can occur with disease progression.So,Lung abscess is common in these pts. CXR :- shows Homogenous non-segmental lobar consolidation showing Bulging fissure sign and lung abscess in 50% of cases.', 'role': 'assistant'}]