High yielding, semi dwarf varieties of rice are -

Options

A. Jaya and Ratna
B. Jaya, Ratna and IR-8
C. Aruna
D. All of these

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks for high yielding, semi-dwarf varieties of rice.

2. **Understand the Terms**:
- **High Yielding**: Refers to varieties that produce a greater amount of rice per unit area compared to traditional varieties.
- **Semi-Dwarf**: Refers to rice plants that are shorter in stature, which helps them withstand lodging (falling over) and often leads to better yield.

3. **Review the Options**: The options provided in the question are:
- A) Jaya and Ratna
- B) Jaya, Ratna, and I am at
- C) Aruna
- D) All of these

4. **Evaluate Each Option**:
- **Option A (Jaya and Ratna)**: Both are known high yielding, semi-dwarf varieties of rice.
- **Option B (Jaya, Ratna, and I am at)**: This option includes Jaya and Ratna, and "I am at" is also a recognized high yielding, semi-dwarf variety.
- **Option C (Aruna)**: This is not a rice variety; it is associated with castor bean, thus incorrect.
- **Option D (All of these)**: Since Aruna is incorrect, this option cannot be correct.

5. **Select the Correct Answer**: The correct answer is **Option B (Jaya, Ratna, and I am at)**, as it includes all the high yielding, semi-dwarf varieties of rice mentioned.

### Final Answer:
High yielding, semi-dwarf varieties of rice are Jaya, Ratna, and I am at.

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