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': 'Flat was is caused by which HP types: \nSelect and explain. \nA. 2, 4, B. 3,10, C. 16,18, D. 5, 8', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. 3, 10', 'role': 'assistant'}]