If the filaments are fused in a single group, the condition is

Options

A. Monandrous
B. Monadelphous
C. Polyadelphous
D. Polyandrous

Answer

To answer the question regarding the condition when filaments are fused in a single group, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the condition where filaments are fused together in a single group.

2. **Identifying Terms**: We need to recognize the relevant terms related to filament fusion in flowers:
- **Monoandrous**: This refers to a condition with a single stem with one anther and one filament. This does not fit our question since it does not involve fusion of multiple filaments.
- **Monoadelphous**: This term indicates that the filaments are fused to form a single bundle or group. This matches the condition described in the question.
- **Polyadelphous**: This condition involves filaments that are fused into multiple bundles, which is not what we are looking for.
- **Polyandrous**: This refers to a condition where both the anther and filament are fused, which again does not match our requirement.

3. **Selecting the Correct Answer**: Based on the definitions:
- The correct condition for filaments fused in a single group is **Monoadelphous**.

4. **Conclusion**: Therefore, the answer to the question is **Monoadelphous**.