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': 'Ideal percentage of CO2 required for growth of Brucella abous ? \nSelect and explain. \nA. 2-5%, B. 5-10%, C. 15-20%, D. 25-30%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is. b. i.e., 5-10% "Addition of 5-10% CO, improves the growth of B abous and B. melitensis".All Brucella spp. are strictly aerobic, but some B. abous biovars, some Brucella isolates from marine mammals, and B. ovis only grow in atmospheres containing 5-10% CO,.', 'role': 'assistant'}]