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
The chance of occurrence of 2 canals in mandibular incisor is how much in % 
Select and explain. 
A. 3, B. 12-Mar, C. 22-41, D. 22-Dec
C: 22-41
Answer: C: 22-41 
Explanation: Mandibular central incisor …incidence of two canals 26%...lateral incisors…28%...