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: Medicine
[{'content': 'The pathogenicity of major pseudomonads is based on oppuunism. The exception is: \nSelect and explain. \nA. Pneumonia, B. Otitis media, C. Melioidosis, D. Skin infection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The pseudomonads are a heterogeneous group of gram-negative bacteria. The members of this group are now assigned to three genera-Pseudomonas, Burkholderia, and Stenotrophomonas. The pathogenicity of most pseudomonads is based on oppounism; the exceptions are the organisms that cause melioidosis (B. pseudomallei) and glanders (B. mallei) Ref: Harisson, Edition - 18, Page 1151.', 'role': 'assistant'}]