Answer: The correct answer for the fill in the blank is A) Nucleus, cytoplasm, ribosome.
According to central dogma, genetic information is transferred from DNA ( deoxyribonucleic acid) to mRNA ( messenger RNA) and finally to proteins.
The DNA is converted to mRNA in a process called transcription. This takes place in the nucleus of the eukaryotic cells. mRNA moves to cytoplasm where it is finally converted to protein ( through translation) at the site called ribosomes.
In other words, mRNA carries information in the form of codons that is used for the synthesis of proteins.