The correct order of steps in Polymerase Chain Reaction ($\text{PCR}$) is:

Getty ImagesThe Polymerase Chain Reaction ($\text{PCR}$) proceeds in three distinct steps:Denaturation: The target $\text{DNA}$ is heated to about $94^{\circ }\text{C}$ to separate the two strands.Annealing: The temperature is lowered to allow primers to bind to their complementary sequences on the single-stranded $\text{DNA}$.Extension: $\text{Taq}$ polymerase adds nucleotides to the primers at about $72^{\circ }\text{C}$, synthesizing a new $\text{DNA}$ strand.