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': 'Erythrasma is caused by - \nSelect and explain. \nA. Corynebacterium minutissimum, B. C. diphtheriae, C. C. ulcerans, D. C. vaginale', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]