Identify the Correct Sequence in Which the Steps Below Occur

Multiple Choice

Identify the correct sequence in which the steps below occur during a single PCR cycle.
1) Complementary base pairing between primers and target DNA.
2) Addition of DNA nucleotides by Taq DNA polymerase.
3) Heat separation of strands of target DNA.

A) 3; 1; 2
B) 1; 2; 3
C) 1; 3; 2
D) 2; 3; 1
E) 2; 1; 3