| A | B | C | D |
a | Denaturation at 94-96 degree C | Extension through Taq polymerase at 72 degree C | Repetition of denaturation and annealing | Annealing at 72 degree C |
b | Denaturation at 94-96 degree C | Annealing at 40-60 degree C | Extension through Taq polymerase at 72 degree C | Repetition of denaturation and annealing |
c | Denaturation at 40-60 degree C | Annealing at 72 degree C | Extension through Taq polymerase at 94-96 degree C | Repetition of denaturation and annealing |
d | Extension through Taq polymerase at 72 degree C | Denaturation at 40 degree C | Annealing at 72 degree C | Repetition of denaturation and annealing |