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
According to Dummer classification Type III is 
Select and explain. 
A. Single apical constriction, B. Tapering apical constriction, C. Multi constricted, D. Parallel constriction
C: Multi constricted
Answer: C: Multi constricted 
Explanation: None