Match the following: 

i-d, ii-a, iii-b, iv-e, v-c

The correct answer is option 2. i-d, ii-a, iii-b, iv-e, v-c.

Let us break down the matching of each base with its corresponding nucleoside:

Nucleosides and Their Components: A nucleoside consists of a nitrogenous base (purine or pyrimidine) attached to a sugar (ribose in RNA or deoxyribose in DNA).

Bases and Their Corresponding Nucleosides:

i. Adenine (A)

Nucleoside: Adenosine

Adenosine is formed when adenine (a purine base) is attached to a ribose sugar. In RNA, the nucleoside formed from adenine and ribose is called adenosine.

ii. Guanine (G)

Nucleoside: Guanosine

Guanosine is formed when guanine (a purine base) is attached to a ribose sugar. This is the nucleoside corresponding to guanine in RNA.

iii. Cytosine (C)

Nucleoside: Cytidine

Cytidine is formed when cytosine (a pyrimidine base) is attached to a ribose sugar. This nucleoside is found in RNA.

iv. Thymine (T)

Nucleoside: Thymidine

Thymidine is formed when thymine (a pyrimidine base) is attached to a deoxyribose sugar. Thymidine is found in DNA, not RNA.

v. Uracil (U)

Nucleoside: Uridine

Uridine is formed when uracil (a pyrimidine base) is attached to a ribose sugar. This is the nucleoside corresponding to uracil in RNA.

Thus, the correct option is: 2. i-d, ii-a, iii-b, iv-e, v-c