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
Largest permanent tooth in mouth is 
Select and explain. 
A. Maxillary 1st molar, B. Mandibular 1st molar, C. Maxillary canine, D. Mandibular canine
A: Maxillary 1st molar
Answer: A: Maxillary 1st molar 
Explanation: None