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: Radiology
[{'content': 'In 20% to 50% of cases, the COC is associated with an unerupted or impacted tooth. The tooth most commonly being: \nSelect and explain. \nA. Incisor, B. Canine, C. Premolar, D. Molar', 'role': 'user'}, {'content': "Answer: B \nExplanation: In 20% to 50% of cases, Calcifying Odontogenic Cyst (COC)\xa0is associated with a tooth (most commonly a cuspid) and impedes its eruption. Displacement of teeth and resorption of roots may occur. Perforation of the cortical plate may be seen radiographically with enlarging lesions.\nReference: White and Pharoah's Oral Radiology Principles and Interpretation 7th edition page no 349", 'role': 'assistant'}]