Which of the following varieties can be develped through clonal selection ?
(I) Cotton (II) Groundnut
(III) Onion (IV) Sugarcane

Options

A. A)III only correct
B. B)I & II are correct
C. C)IV only correct
D. D)III & IV are correct

Answer

To determine which varieties can be developed through clonal selection, we need to understand what clonal selection is and which crops are typically propagated vegetatively.

### Step-by-Step Solution:

1. **Understand Clonal Selection**: Clonal selection is a method used to select desirable clones from a mixed population of vegetatively propagated crops. This method is particularly useful for improving traits in crops that do not reproduce sexually.

2. **Identify the Crops**: The question provides four crops:
- (I) Cotton
- (II) Groundnut
- (III) Onion
- (IV) Sugarcane

3. **Evaluate Each Crop**:
- **Cotton**: Cotton is primarily propagated through seeds and is not typically developed through clonal selection.
- **Groundnut**: Groundnut is also primarily propagated through seeds and is not developed through clonal selection.
- **Onion**: Onions can be propagated vegetatively (through bulbs), making them suitable for clonal selection.
- **Sugarcane**: Sugarcane is a classic example of a crop that is propagated vegetatively (through cuttings), and it can be developed through clonal selection.

4. **Conclusion**: Based on the evaluation:
- Cotton and Groundnut cannot be developed through clonal selection.
- Onion and Sugarcane can be developed through clonal selection.

5. **Final Answer**: Therefore, the correct answer is (III) Onion and (IV) Sugarcane. This corresponds to option D, which states that both three and four are correct.