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: Dental
[{'content': "Which is not a eugenol sealer? \nSelect and explain. \nA. Grossman sealer, B. AH-26, C. Tubli seal, D. Wach's paste", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]