Select the odd one w.r.t natural methods of reproduction.

Options

A. Rhizome in Banana
B. Offset in water hyacinth
C. Root cuttings in Blackberry
D. Aerial shoots in Opuntia

Answer

To solve the question of selecting the odd one out with respect to natural methods of reproduction, we will analyze each option provided:

1. **Rhizome of Banana**:
- Rhizomes are underground stems that grow horizontally. They can produce new shoots and roots, allowing for asexual reproduction. This is a natural method of reproduction as it does not involve human intervention.

2. **Offset in Water Hyacinth**:
- Offsets are small daughter plants that develop from the parent plant. Water hyacinth reproduces naturally through offsets, which are a form of vegetative reproduction. This is also a natural method of reproduction.

3. **Root Cutting in Blackberry**:
- Root cutting involves taking a section of the root from a plant and planting it to grow a new plant. This method typically requires human intervention for the cutting and planting process, making it a form of artificial propagation rather than a natural method of reproduction.

4. **Aerial Shoot in Opuntia**:
- Aerial shoots, or pads, of Opuntia (cactus) can develop roots and grow into new plants. This is a natural method of reproduction as it occurs without human intervention.

Based on the analysis:

- The first option (Rhizome of Banana), second option (Offset in Water Hyacinth), and fourth option (Aerial Shoot in Opuntia) are all natural methods of reproduction.
- The third option (Root Cutting in Blackberry) is the odd one out as it involves human intervention.

**Final Answer**: The odd one out is **Root Cutting in Blackberry**.