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': "The most common variant of malocclusion seen is: \nSelect and explain. \nA. Angle's class-I occlusion with anterior crowding, B. Angle's class-I occlusion with posterior crowding, C. Angle's class-II div I, D. Angle's class-II div II", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]