Purity of seed is guranteed by

Options

A. ICAR
B. NBPGR
C. National seed corporation
D. All the above

Answer

To determine how the purity of seed is guaranteed, we can analyze the options provided:

1. **Understanding the Options**:
- **ICAR (Indian Council of Agricultural Research)**: This organization primarily focuses on agricultural research and education. It does not directly guarantee seed purity.
- **NBPGR (National Bureau of Plant Genetic Resources)**: This bureau works on the conservation and improvement of plant genetic resources. While it plays a significant role in agricultural development, it does not specifically guarantee seed purity.
- **National Seed Corporation (NSC)**: This is a government body that is responsible for the production and distribution of quality seeds. It ensures the purity of seeds through various regulations and standards.

2. **Evaluating the Options**:
- Since ICAR and NBPGR do not guarantee seed purity, we can eliminate them as options.
- The National Seed Corporation is specifically tasked with ensuring seed quality and purity.

3. **Conclusion**:
- Based on the analysis, the correct answer is **National Seed Corporation** (option 3).

### Final Answer:
Purity of seed is guaranteed by the **National Seed Corporation**.