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
Highest incidence of Maxillary extra canal is seen in
which tooth 
Select and explain. 
A. Maxillary 1 PM, B. Maxillary 1st molar, C. Maxillary 2nd molar, D. Mandibular 1st PM
B: Maxillary 1st molar
Answer: B: Maxillary 1st molar 
Explanation: None