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
Which of the following wax is not ﬂowable at  mouth temperature? 
Select and explain. 
A. Iowa wax, B. Korecta wax No.6, C. Korecta wax No.4, D. Adaptol wax
B: Korecta wax No.6
Answer: B: Korecta wax No.6 
Explanation: Fluid wax: These are waxes that flow at mouth temperature and are firm at room temperature. Commonly used waxes are Iowa wax (white) by Dr.Smith, Korecta wax no:4 (orange) by Dr.O.C. Applegate, Adaptol wax (green) by Nathan.G.Kaye.
Ref: Textbook of prosthodontics by Nallaswamy Ed 2nd  Pg 87