The process that should be happened in the diagram is transcription. Hence, the option b is correct.
What is Transcription?
It is the process where the DNA segment should be copied into the RNA. Here the DNA segment should be transcribed to RNA molecules due to which it encoded the proteins where the RNA messenger should be generated.
The other DNA segments when copies to the molecules of the RNA that we called as the non-coding RNAs.
Therefore, the option b is correct.
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