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 and CO,, B. It is not capsulated, C. Invasive strain is most common, D. Gram positive', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is. 'c' i. e., Invasive strain is most common", 'role': 'assistant'}]