This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
In conversion of DNA to RNA, enzyme required 
Select and explain. 
A. DNA - Polymerase, B. DNA Ligase, C. DNA - Polymerase, D. RNA polymerase
D: RNA polymerase
Answer: D: RNA polymerase 
Explanation: RNA polymerase also is known as DNA-dependent RNA polymerase, is an enzyme that produces primary transcript RNA.In cells, RNAP is necessary for constructing RNA chains using DNA genes as templates, a process called transcription. RNA polymerase enzymes are essential to life and are found in all organisms and many viruses. In chemical terms, RNAP is a nucleotidyl transferase that polymerizes ribonucleotides at the 3&; end of an RNA transcript.