What kind of nitrogen bases are present in a DNA?

Explanation

To answer the question "What kind of nitrogen bases are present in DNA?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding DNA Composition**:
- DNA, or deoxyribonucleic acid, is a crucial nucleic acid that serves as the genetic material in living organisms. It consists of three main components: nitrogenous bases, deoxyribose sugar, and phosphate groups.

2. **Identifying Nitrogenous Bases**:
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