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': 'Anterior guidance is absent in all, except: \nSelect and explain. \nA. Anterior open bite, B. Posterior open bite, C. Increased overjet with class II, D. Reverse overjet and overbite (class III)', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]