The correct option is C Modified GTP at the 5’ end and Poly A tail at the 3’ end
The newly transcribed mRNA strand undergoes processing before it proceeds into the cytoplasm. This processing involves capping, which is the addition of a modified form of guanosine triphosphate (GTP) at the 5’ end, and tailing, which involves the addition of about 200-250 adenines at the 3’ end to form the poly A tail.