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': 'According to Dummer classification Type III is \nSelect and explain. \nA. Single apical constriction, B. Tapering apical constriction, C. Multi constricted, D. Parallel constriction', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]