Which of the following is an example of mutation breeding?

Options

A. (a) Pusa Swarnim, resistant to white rust
B. (b) Mung bean, resistant to yellow mosaic virus
C. (c) Pusa Sadabahar, resistant to chilli mosaic virus
D. (d) Pusa Gaurav, resistant to aphids

Explanation

To determine which of the following is an example of mutation breeding, we can analyze the options provided:

1. **Understanding Mutation Breeding**:
- Mutation breeding is a technique that involves exposing seeds or plants to chemicals or radiation to induce mutations. These mutations can lead to desirable traits in the plants, such as improved yield, disease resistance, or other beneficial characteristics.

2. **Analyzing the Options**:
- **A. Pusa Svarnim**: This is a product of hybridization, not mutation breeding.
- **B. Moong Bean**: This is a product of mutation breeding, as it has been developed through the process of inducing mutations.
- **C. Pusa Sadabahar**: This is also a product of hybridization, not mutation breeding.
- **D. Pusa Gaurav**: This is another product of hybridization, not mutation breeding.

3. **Conclusion**:
- Based on the analysis, the only option that represents an example of mutation breeding is **B. Moong Bean**.

### Final Answer:
**B. Moong Bean**