Arrange the steps of diagnosing AIDS using the RT PCR method in the right order.I. DNA, engineered primers specific to HIV genes, and nucleotides along with buffers are incubated in a thermal cycler.II. Viral RNA is extracted from the patient’s plasma or blood sample.III. The PCR product is run on a gel to separate and identify the PCR amplified viral genes.IV. Reverse transcriptase is used to convert the RNA to cDNA.