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': 'Clinical diphtheria is caused by - \nSelect and explain. \nA. Corynebacterium diphtheriae, B. Corynebacterium parvum, C. C. ulcerans, D. Streptococcus pyogenes', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Corynebacterium diphtheriae Diphtheria is a nasophaiyngeal & skin infection caused by Corynebacterium diphtheriae", 'role': 'assistant'}]