Genetic mutations occur in :-

Options

A. DNA
B. RNA
C. Protein
D. RNA & protein both

Answer

### Step-by-Step Solution:

1. **Understand the Definition of Genetic Mutation**:
- Genetic mutation refers to a change in the chemical structure of a gene, which can lead to alterations in the genetic information.

2. **Identify Where Genes Are Located**:
- Genes are primarily located in DNA. They contain the instructions for building proteins and are responsible for hereditary traits.

3. **Evaluate the Options**:
- Option A: DNA - This is where genes are located, so mutations can occur here.
- Option B: RNA - While RNA is involved in the expression of genes, it does not contain genes itself.
- Option C: Protein - Proteins are the products of gene expression and do not contain genetic information.
- Option D: RNA and protein both - Neither RNA nor protein contains genes, so mutations cannot occur here.

4. **Conclude the Correct Answer**:
- Since genetic mutations occur in the chemical structure of genes, and genes are found in DNA, the correct answer is **Option A: DNA**.