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: Medicine
Enzyme(s) used in polymerase chain reaction is/are: 
Select and explain. 
A. Restriction endonuclease, B. DNA polymerase, C. Alkaline phosphate, D. RNA polymerase
B: DNA polymerase
Answer: B: DNA polymerase 
Explanation: B i.e. DNA Polymerase