Which is the base that is present in RNA but not DNA?

Explanation

To answer the question "Which is the base that is present in RNA but not DNA?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Nucleic Acids**:
- Both RNA (ribonucleic acid) and DNA (deoxyribonucleic acid) are types of nucleic acids. They are composed of three main components: a sugar, a phosphate group, and nitrogenous bases.

2. **Identify the Nitrogenous Bases in RNA**:
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