The correct answer is (a) 5′ capping, 3′ polyadenylation and RNA splicing
Explanation: After transcription, the pre-mRNA is modified to produce matured mRNA. The modification of mRNA includes the following- 5′ methul guanosine capping that protects the mRNA from RNases, 3′ polyadenylation and splicing of the introns of pre-mRNA.