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': 'ADA specification number for Resin Based Restorative material is: \nSelect and explain. \nA. 26, B. 27, C. 28, D. 30', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ANSI/ADA Specification No. 27—Resin-Based Filling Materials: 1997.\nThis standard specifies requirements for dental resin-based restorative materials supplied in a form suitable for mechanical mixing, hand mixing, or external energy activation.\nRef: Philip’s Science of Dental Materials , Anusavice , 11th edition', 'role': 'assistant'}]