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': 'The bacteria frequently used as an immuno modulator is - \nSelect and explain. \nA. Corynebacterium parvum, B. Mycobacterium marinum, C. Chromobacterium violasium, D. Flavobacterium meningosepticum', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Corynebacterium parvum . Corynebacterium parum is frequently used as an immunomodulator. . It is a mixture of Propionibacterium species.", 'role': 'assistant'}]