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
[{'content': 'In PCR Acquaticus thermophilus is preferred over E.coli. because: \nSelect and explain. \nA. Thermostable at temperature at which DNA liquefies., B. Proof reading done., C. Done in more precisely, D. Does not require primer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Thermostable at temperature at which DNA liquiefies', 'role': 'assistant'}]