Which of the following variety of plant is effective against aphids ?

Options

A. Pusa Sawani
B. Pusa A - 4
C. Pusa Gaurav
D. Pusa swarnim

Answer

To solve the question of which variety of plant is effective against aphids, we will analyze each option provided:

1. **Pusa Sawani**: This variety is known to control fruit borers. However, fruit borers are not related to aphids, which means Pusa Sawani does not provide any control against aphids.

2. **Pusa A4**: This variety is effective against the yellow vein mosaic virus and other mosaic viruses. Since aphids are insects and not viruses, Pusa A4 does not control aphids.

3. **Pusa Gaurav**: This variety is specifically noted for its insect resistance. Since aphids fall under the category of insects, Pusa Gaurav is effective against them. This makes it a suitable choice for controlling aphids.

4. **Pusa Swarnim**: This variety is resistant to white rust in wheat. White rust is a fungal disease, and since it does not pertain to aphids, Pusa Swarnim is not effective against them.

Based on the analysis above, the correct answer is **Pusa Gaurav**, as it is effective against aphids due to its insect-resistant properties.

### Step-by-Step Solution:
1. Identify the pest: Aphids are insects that harm plants.
2. Analyze each plant variety:
- **Pusa Sawani**: Controls fruit borers (not aphids).
- **Pusa A4**: Controls yellow vein mosaic virus (not aphids).
- **Pusa Gaurav**: Insect resistant, effective against aphids.
- **Pusa Swarnim**: Resistant to white rust (not aphids).
3. Conclude that **Pusa Gaurav** is the effective variety against aphids.