The figure below shows three steps (A,B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents?
(A) C-Extension in the presence of heat stable DNA polymerase
(B) A-Annealing with two sets of primers
(C) B-Denaturation at a temperature of about 98°C separating the two DNA strands
(D) A-Denaturation at a temperature of about 50°C