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The figure below hree steps. (A,B,C) of ...

The figure below hree steps. (A,B,C) of Polymerase Chain Reaction (PCR).Select the option giving correct identification together with what it represents?
.

A

B-denaturation at a temperature of about `98^C` separating the two DNA strands.

B

A - denaturation at a temperature of about `50^C`.

C

C- extension in the presence of heat stable DNA polymerase.

D

A - annealing with two sets of primers.

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