Match the terms in List I with their correct descriptions in List II and choose the correct option.

List I	List II
(A) Splicing	(I) Polyadenylation.
(B) Capping	(II) Express sequences or coding sequences.
(C) Tailing	(III) Removal of introns.
(D) Exons	(IV) Addition of methylated guanosine tri phosphate to 5' end.

Splicing is the process where introns are removed and exons are joined together in a defined order. Thus, (A) matches with (III).

Capping involves the addition of an unusual nucleotide, methyl guanosine triphosphate, to the 5' end of the heterogeneous nuclear RNA (hnRNA). Thus, (B) matches with (IV).

Tailing is the process where adenylate residues (200-300) are added at the 3' end in a template-independent manner, which is also known as polyadenylation. Thus, (C) matches with (I).

Exons are the coding sequences or expressed sequences that appear in mature or processed RNA. Thus, (D) matches with (II).

The correct matching is (A) - (III), (B) - (IV), (C) - (I), (D) - (II).

Answer: (A) - (III), (B) - (IV), (C) - (I), (D) - (II).