Transcription
Transcription is a process that occurs in the nucleus of the cell in which there is a reading of a part of the DNA that will give rise to an RNA (mRNA).
This process is very important because soon after transcription, the mRNA goes into the cytoplasm of the cell and binds to a ribosome. From this, the translation process will begin and as a result, a sequence of amino acids will emerge that will give rise to a protein.
So alternative "b" is the answer.