Assertion :The site of translation (protein synthesis) is ribosomes.
Reason : Ribosomes bind to mRNA and provide platform for joining of amino acids.

Both A and R are true and R is the correct explanation of A .

• Assertion (A) is accurate. Ribosomes are indeed the sites where translation occurs, facilitating the synthesis of proteins from mRNA transcripts. Ribosomes consist of two subunits—large and small—that come together during translation to assemble amino acids into polypeptide chains based on the information carried by the mRNA.
• Reason (R) is also true and provides an accurate explanation for assertion (A). Ribosomes bind to mRNA molecules and utilize the genetic information encoded in the mRNA's nucleotide sequence to direct the order in which amino acids are brought together to form proteins. The ribosome's structure provides a platform for the proper alignment and bonding of amino acids according to the mRNA's codon sequence.

Therefore, the correct choice according to the provided options is:

Both A and R are true and R is the correct explanation of A.