Western blotting is used for the identification of :-

Options

A. DNA
B. RNA
C. Protein
D. All the above

Answer

### Step-by-Step Solution:

1. **Understanding Western Blotting**: Western blotting is a laboratory technique used to detect specific proteins in a sample. It involves the separation of proteins by gel electrophoresis, followed by transfer to a membrane and detection using antibodies.

2. **Comparison with Other Blotting Techniques**:
- **Southern Blotting**: This technique is used for the identification of DNA molecules. It involves the transfer of DNA from an agarose gel to a membrane.
- **Northern Blotting**: This technique is used for the identification of RNA molecules. Similar to Southern blotting, it also involves gel electrophoresis and transfer to a membrane.
- **Dot Blotting**: This is a simpler technique that does not involve gel electrophoresis and is used for the identification of proteins.

3. **Conclusion**: Since Western blotting specifically targets proteins, the correct answer to the question is that Western blotting is used for the identification of proteins.

### Final Answer:
Western blotting is used for the identification of proteins.