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
E.H. Angle introduced his classification of malocclusion in: 
Select and explain. 
A. 1876, B. 1900, C. 1899, D. 1903
C: 1899
Answer: C: 1899 
Explanation: ANGLE'S CLASSIFICATION OF MALOCCLUSION
In 1899, Edward Angle classiﬁed malocclusion based on the mesial-distal relation of the teeth, dental arches and jaws. He considered the maxillary ﬁrst permanent molar as a ﬁxed anatomical point in the jaws and the key to occlusion.
Ref: Textbook of orthodontics Gurkeerat Singh 2nd ed page no 163