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: Biochemistry
In PCR Acquaticus thermophilus is preferred over E.coli. because - 
Select and explain. 
A. Thermostable at temperature at which DNA liquefies, B. Proofreading done, C. Done in more precisely, D. Does not require primer
A: Thermostable at temperature at which DNA liquefies
Answer: A: Thermostable at temperature at which DNA liquefies 
Explanation: None