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 mandibular molars generally have 
Select and explain. 
A. Two roots & two canals, B. Two roots & three canals, C. Three toots & two canals, D. None of the above
B: Two roots & three canals
Answer: B: Two roots & three canals 
Explanation: None