Question

helps form ribosomes, where proteins are assembled.
a messenger rna
b ribosomal rna
c transfer rna

Explanation:

Ribosomal RNA (rRNA) is a key component of ribosomes, the molecular machines that assemble proteins. Messenger RNA (mRNA) carries genetic information for protein - making, and transfer RNA (tRNA) brings amino acids to the ribosome during protein synthesis.

Answer:

B. Ribosomal RNA