Question

what nitrogenous bases pairs with adenine (a) in rna?
guanine (g)
cytosine (c)
uracil (u)

Explanation:

In RNA, the base - pairing rules are that adenine (A) pairs with uracil (U), and cytosine (C) pairs with guanine (G). This is a fundamental concept in molecular biology (a sub - field of Biology, which is part of Natural Science). By recalling these base - pairing rules, we can determine the correct answer.

Answer:

uracil (U)