Vegetative propagation in banana occurs by

Options

A. offset
B. rhizome
C. sucker
D. runner

Explanation

### Step-by-Step Solution:

1. **Understanding Vegetative Propagation**:
- Vegetative propagation is a form of asexual reproduction in plants where new individuals arise from vegetative parts of the parent plant, such as stems, roots, or leaves.

2. **Identifying the Methods of Vegetative Propagation**:
- The question provides several options for methods of vegetative propagation: offset, rhizome, sucker, and runners.

3. **Evaluating Each Option**:
- **Offset**: This method involves a short lateral branch that develops into a new plant. It is common in aquatic plants like Pistia and Eichhornia, but not in bananas.
- **Rhizome**: This is an underground stem that grows horizontally and can produce new shoots and roots. This method is indeed used by bananas for propagation.
- **Sucker**: This method involves slender underground stems that develop from the base of the aerial shoot. It is seen in plants like mint and chrysanthemum, but not in bananas.
- **Runners**: These are horizontal stems that grow along the ground and can produce new plants at intervals. They are typical in grasses but not in bananas.

4. **Conclusion**:
- Based on the evaluation, the correct method of vegetative propagation in bananas is through **rhizomes**.

### Final Answer:
- **Vegetative propagation in banana occurs by rhizomes.**