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: Pathology
[{'content': 'A patient gives history of recurrent episodes of pain and swelling in Mandibular posterior region.He is diagnosed to have pericoronitis.The partially erupted 3rd molar was vital.On radiographical examination a well defined radiolucency was found with distal aspect of the respected tooth. What could be the daignosis: \nSelect and explain. \nA. Dentigerous cyst., B. Paradental cyst., C. Eruption cyst., D. Periapical cyst.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Paradental Cyst\nAka:\n\nBaccal bifurcation Cyst\nCraig’s cyst\nCollateral cyst\nMandi 3rd molar – Association.\n\nAssociated with VITAL TOOTH and recurrent pericoronitis DISTAL Aspect of mandi 3rd molar', 'role': 'assistant'}]