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
C shaped root canals are preferably found in (Maximum incidence) 
Select and explain. 
A. Mand 1st molar, B. Maxillary 2nd molar, C. Maxillary 1stmolar, D. Mand 2nd molar
D: Mand 2nd molar
Answer: D: Mand 2nd molar 
Explanation: None