This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Microbiology
Mark the false statement regarding testing of covid 19 
Select and explain. 
A. Most predominant method of diagnosis of Covid 19 is -PCR, B. First line screening assay: N gene assay, C. Confirmatory assay: RdRp gene assay, D. Peripheral ground glass opacities on CT is the hallmark feature
B: First line screening assay: N gene assay
Answer: B: First line screening assay: N gene assay 
Explanation: Testing of Covid 19 Most predominant method of diagnosis of Covid 19 is -PCR. First line screening assay: E gene assay. Confirmatory assay: RdRp (RNA-dependent RNA polymerase) gene assay. Additional confirmatory assay: N gene assay. CT features B/L and peripheral ground glass opacities Crazy paving pattern Lung consolidation