Hi there!
We can go through the overall function of all three of these:
mRNA: transcribed from the DNA, has the protein's composition written in it, and brings that to a ribosome where the protein will be made
tRNA: looks at the codons (set of 3 nucleotides) on the mRNA and brings amino acids which match up to that codon
rRNA: significant part of the composition of ribosomes
Now, looking at these, and back to the answer choices, we can already see that a, b, and c are correct. d, on the other hand, is incorrect.
Hope this helps! Feel free to let me know if you have any questions about this specific problem.
