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': 'Apical cyst having a direct connection with apical foramen have been termed as \nSelect and explain. \nA. Residual, B. Bay, C. Paradental, D. Collateral', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]