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
The bacteria frequently used as an immuno modulator is - 
Select and explain. 
A. Corynebacterium parvum, B. Mycobacterium marinum, C. Chromobacterium violasium, D. Flavobacterium meningosepticum
A: Corynebacterium parvum
Answer: A: Corynebacterium parvum 
Explanation: Ans. is 'a' i.e., Corynebacterium parvum . Corynebacterium parum is frequently used as an immunomodulator. . It is a mixture of Propionibacterium species.