The function of trna is to
a. bring amino acids to transfer or activate mrna into protein chains
b. migrate to the ribosomes for manufacturing amino acids
c. produce telomeres that prevent rapid aging
d. transfer mrna out of the ribosome where it can be free of interference from harm

The correct answer is a. bring amino acids to transfer or activate mRNA into protein chains

Explanation:

tRNA is a molecule made up of RNA which plays a role in protein synthesis. It is also called acceptor RNA. It has a clover life like secondary structure which contains loops and stems. These loops and stems make D-stem and loop, T- stem and loop, anticodon stem and loop and an acceptor arm.

tRNA acceptor arm is the site for amino acid attachment and its anticodon loop contains complementary triplet sequence with respect to mRNA base pairs it bind with and adds a specific amino acid to the polypeptide chain during translation.

One tRNA adds only one amino acid and each amino acids contains its own tRNA molecule which has triplet anticodon complementary to base pairs present in mRNA.  

So, the right answer is a. bring amino acids to transfer or activate mRNA into protein chains.