Which high -yielding semi dwarf variety of rice was developed in India?

Options

A. Ratna
B. IR-8
C. Taicung Native-I
D. Kalyan sona

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a specific high-yielding semi-dwarf variety of rice that was developed in India.

2. **Identifying Key Terms**: The key terms in the question are "high-yielding," "semi-dwarf," and "developed in India."

3. **Reviewing Historical Context**: Between 1960 and 2000, India saw a significant increase in rice production due to the introduction of semi-dwarf varieties. This period marked the Green Revolution in India, which aimed to enhance food production.

4. **Listing Possible Varieties**: The transcript mentions several rice varieties:
- Ratna
- IR8
- Thai Chong Native
- Kalyan Sona

5. **Evaluating Each Variety**:
- **Ratna**: Developed in India and is a semi-dwarf variety.
- **IR8**: Developed at the International Rice Research Institute (IRRI) in the Philippines, not in India.
- **Thai Chong Native**: Not mentioned as an Indian variety.
- **Kalyan Sona**: This is a variety of wheat, not rice.

6. **Conclusion**: The only high-yielding semi-dwarf variety of rice developed in India is **Ratna**.

**Final Answer**: Ratna

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