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': 'True about H influenza - \nSelect and explain. \nA. Grown on sheep blood agar & CO2, B. It is not capsulated, C. Invasive strain is most common, D. Gram positive', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]