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Semi-conservative replication of DNA results in the formation of two daughter DNA molecules, each with a parental strand and a newly synthesized strand.

Replication of DNA is always done in the 5'-3' orientation. As a result, option (a) is correct.

Option (a) is denoted by the letter DNA polymerase is an enzyme that adds nucleotides to existing strands during $5^1-3^1$ DNA replication. The activity of DNA polymerase is present. As a result, DNA polymerase adds nucleotides to the RNA primer's free hydroxyl group when the DNA template is read in the to direction. As a result, the new strand's synthesis progresses in the same direction.

3'to 5'is the range for option (b). The DNA template is read in this direction, although DNA synthesis occurs in the 5'-3' direction. As a result, it is an inaccurate response.

Option (c) is denoted by the number 5'. 5'-3' is where DNA is synthesized. As a result, it is an inaccurate response.

Option (d) is denoted by the number 3'. 5'-3' is where DNA is synthesized. As a result, it is an inaccurate response.

As a result, alternatives (b), (c), and (d) are wrong.