Initiation step during the process of transcription in bacteria is shown below. Identify A, B, C and D by selecting the option :
A. A-RNA, polymerase, B - Promoter, C-Sima factor, D-DNA helix
B. A-Promoter, B - Sigma factor, C- RNA polymerase, D-DNA helix
C. A - Promoter, B - RNA polymerase, C - DNA helix, D-Sigma factor
D. A - Promoter, B - RNA polymerase, C - Sigma factor, D-DNA helix
