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': 'E.H. Angle introduced his classification of malocclusion in: \nSelect and explain. \nA. 1876, B. 1900, C. 1899, D. 1903', 'role': 'user'}, {'content': "Answer: C \nExplanation: ANGLE'S CLASSIFICATION OF MALOCCLUSION\nIn 1899, Edward Angle classiﬁed malocclusion based on the mesial-distal relation of the teeth, dental\xa0arches and jaws. He considered the maxillary ﬁrst permanent molar as a ﬁxed anatomical point in the jaws and the key to occlusion.\nRef: Textbook of orthodontics Gurkeerat Singh 2nd ed page no 163", 'role': 'assistant'}]