DWQA QuestionsCategory: GS Paper IIIQ. The testing of Covid-19 samples can be done either on the basis of presence of antigen or antibody in the blood samples. Give the pros and Cons of testing Covid-19 samples on both the approaches. RT-PCR, the gold standard for Covid-19 testing, is based on which of the two approaches? (GS Mains Paper III; Science & Technology, 250 words, 15 marks)