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: Surgery
[{'content': 'The most frequent tooth to be impacted is- \nSelect and explain. \nA. Lower third molar, B. Lower canine, C. Upper third molar, D. Upper premolar', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Lower third molar Impacted tooth Is the tooth that has failed to erupt completely or paially to its correct position in the dental arch and its eruption potential has been lost. Order of frequency - Mandibular 3rd molar (i.e. Lower 3rd molar) - Maxillary 3rd molar (Upper 3rd molar) - Maxillary canine", 'role': 'assistant'}]