Question

Eukaryotic processing of the primary transcript includes __________
a. the addition of a sê cap, a 3ê poly-A tail, and the splicing out of introns
$b$. the addition of a 5ê cap, a 3ê poly-A tail, and the splicing out of exons
$c$. the addition of a 5ê cap, a 3ê poly-A tail, the splicing out of introns, and a polyadenylation signal
$d$. the addition of a 5ê poly-A tail, a 3ê cap, and the splicing out of exons
e. the addition of a 5ê poly-A tail, a 3ê cap, and the splicing out of introns