This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
[{'content': 'DNA Amplification is done in \nSelect and explain. \nA. PCR, B. NASBA (Nucleic acid sequential based amplification), C. Ligase chain reactions, D. DNA sequencing', 'role': 'user'}, {'content': 'Answer: A \nExplanation: PCR is an in-vitro DNA amplification procedure in which millions of copies of pariticular sequence of DNA can br produced within a few hoursTwo DNA primers about 20-30 nucleotides with complementary sequence of the flanking region can be synthesized', 'role': 'assistant'}]