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: Microbiology
[{'content': 'Most common form of Nocardial respiratory tract infection is ? \nSelect and explain. \nA. Laryngitis, B. Pharyngitis, C. Tonsilitis, D. Pneumonia', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e.,Pneumonia Nocardia are 'gram positive' `acid fast' filaments. Nocardia are strict aerobes and paially urease and catalase positive. Since nocardiae are among the few aerobic microorganism that use paraffin as a carbon source, paraffin baiting can be used to isolate the organism from mixed culture.", 'role': 'assistant'}]