In a PCR cycle, identify correct labelling of sequence: [1] Denatu...

In a PCR cycle, identify correct labelling of sequence: [1] Denaturation [2] Annealing [3] Extension

A. [2] – [1] – [3] – [3]

B. [1] – [3] – [2] – [3]

C. [1] – [2] – [3] – [2]

D. [3] – [1] – [2] – [1]