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': 'Bacterial species seen in skin ? \nSelect and explain. \nA. Lactobacillus, B. Streptococcus pneumonia, C. Bacterioides fragilis, D. Propionobacterium', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Propionobacterium", 'role': 'assistant'}]