DNA was first discovered by-

Options

A. Miescher
B. Altman
C. Watson
D. Wilkins

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks who first discovered DNA. This requires knowledge of the history of DNA research and the contributions of various scientists.

2. **Reviewing the Options**: The options provided are Mishir, Altman, Watson, and Wilkins. We need to analyze each of these names in the context of their contributions to DNA research.

3. **Identifying Key Contributions**:
- **Mishir**: He is credited with the identification and isolation of DNA from the nuclei of pus cells. This is a significant milestone in the discovery of DNA.
- **Watson and Crick**: They are known for proposing the double helix model of DNA structure, which is a crucial development in understanding how DNA functions, but they did not discover DNA itself.
- **Altman**: While he made contributions to biochemistry, he is not known for the discovery of DNA.
- **Wilkins**: He contributed to the understanding of DNA through X-ray diffraction studies but did not discover DNA.

4. **Conclusion**: Based on the historical context and contributions of these scientists, the correct answer is that DNA was first discovered by Mishir.

5. **Final Answer**: Therefore, the answer to the question "DNA was first discovered by" is **Mishir**.

---