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
Two pulp canals are usually found in 
Select and explain. 
A. Mesial root of permanent mandibular first molar, B. Distal root of permanent mandibular first molar, C. Palatal root of permanent maxillary first molar, D. Distal root of permanent mandibular second molar
A: Mesial root of permanent mandibular first molar
Answer: A: Mesial root of permanent mandibular first molar 
Explanation: None