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: Dental
[{'content': 'Which malocclusion will not lead to straining of Lips? \nSelect and explain. \nA. Class - II Div. 1, B. Class-II Div. 2, C. Bimaxillary protrusion, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]