The semi dwarf varieties rice varieties are:

Options

A. Sonalika and Kalyan Sona
B. Jaya and Ratna
C. Pusa sawani and Pusa sem 2
D. Pusa Komal and Pusa swarnim

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the semi-dwarf varieties of rice. This indicates that we are looking for specific rice varieties that are classified as semi-dwarf and are known for high yield.

2. **Analyzing the Options**: The options given are:
- A) Sonalika and Kalyan Sona
- B) Jaya and Ratna
- C) Pusa Swani and Pusa Centu
- D) Pusa Komal and Pusa Swanim

3. **Identifying the Correct Varieties**:
- **Option A**: Sonalika and Kalyan Sona are actually wheat varieties, not rice. Thus, this option is incorrect.
- **Option B**: Jaya and Ratna are known semi-dwarf high-yielding rice varieties developed in India after 1966. This option is likely correct.
- **Option C**: Pusa Swani is an insect-resistant variety of okra, and Pusa Centu is a variety of flat bean. Therefore, this option is incorrect.
- **Option D**: Pusa Komal is a variety of cowpea, and Pusa Swanim is a variety of Brassica. Hence, this option is also incorrect.

4. **Conclusion**: After analyzing all the options, the correct answer is **B) Jaya and Ratna**, as these are recognized semi-dwarf rice varieties.

### Final Answer:
The semi-dwarf varieties of rice are **Jaya and Ratna**.

---