What are building blocks of nucleic acids ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Nucleic Acids**: Nucleic acids are essential biomolecules that include DNA (Deoxyribonucleic Acid) and RNA (Ribonucleic Acid). They play a crucial role in storing and transmitting genetic information.

2. **Identifying the Building Blocks**: The fundamental units that make up nucleic acids are called nucleotides. Each nucleic acid is composed of a long chain of these nucleotides linked together.

3. **Components of Nucleotides**: Each nucleotide consists of three main components:
- **Nitrogenous Base**: There are two types of nitrogenous bases:
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