This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral Cavity, Subject name: Surgery
The most frequent tooth to be impacted is: 
Select and explain. 
A. Lower third molar, B. Lower canine, C. Upper third molar, D. Upper premolar
A: Lower third molar
Answer: A: Lower third molar 
Explanation: Ans. (a) Lower third molar* Impacted tooth: MC in Lower 3rd Molar > upper 3rd Molar> Upper canine* Impacted tooth can produce referred pain via the direct impingement of Auriculotemporal nerve.