Which nitrogenous bases are found in $\mathrm{RNA}$?

• A. $\mathrm{Adenine}$, $\mathrm{Uracil}$, $\mathrm{Thymine}$, $\mathrm{Guanine}$
• B. $\mathrm{Adenine}$, $\mathrm{Uracil}$, $\mathrm{Cytosine}$, $\mathrm{Guanine}$
• C. $\mathrm{Adenine}$, $\mathrm{Thymine}$, $\mathrm{Cytosine}$, $\mathrm{Guanine}$
• D. $\mathrm{Adenine}$, $\mathrm{Thymine}$, $\mathrm{Cytosine}$, $\mathrm{Uracil}$

Answer: (B)

Verified step by step guidance

1. Understand the structure of RNA: RNA, or ribonucleic acid, is a nucleic acid similar to DNA but differs in its sugar component and one of its nitrogenous bases.
2. Identify the nitrogenous bases in RNA: RNA contains four nitrogenous bases, which are adenine (A), uracil (U), cytosine (C), and guanine (G).
3. Recognize the difference between RNA and DNA bases: Unlike DNA, which contains thymine (T), RNA contains uracil (U) instead of thymine.
4. Review the options provided: Compare the options given in the problem with the known bases of RNA to identify the correct set of bases.
5. Select the correct answer: Based on the knowledge that RNA contains adenine, uracil, cytosine, and guanine, choose the option that matches these bases.