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
In PCR Acquaticus thermophilus is preferred over E.coli. because: 
Select and explain. 
A. Thermostable at temperature at which DNA liquefies., B. Proof reading 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: A i.e. Thermostable at temperature at which DNA liquiefies