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 of the following wax is not ﬂowable at  mouth temperature? \nSelect and explain. \nA. Iowa wax, B. Korecta wax No.6, C. Korecta wax No.4, D. Adaptol wax', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fluid wax: These are waxes that flow at mouth temperature and are firm at room temperature. Commonly\xa0used\xa0waxes are\xa0Iowa\xa0wax (white) by Dr.Smith, Korecta wax no:4 (orange) by Dr.O.C. Applegate, Adaptol wax (green) by Nathan.G.Kaye.\nRef: Textbook of prosthodontics by Nallaswamy Ed 2nd\xa0 Pg 87', 'role': 'assistant'}]