Tetradynainous stamens are typical of-

Options

A. Brassicacae
B. Solanaceae
C. Liliaceae
D. Fabaceae

Answer

### Step-by-Step Solution:

1. **Understanding Tetradynamic Stamens**:
- Tetradynamic stamens refer to a specific arrangement of stamens in flowers where there are a total of six stamens.
- In this arrangement, there are four long stamens and two short stamens.

2. **Identifying the Family**:
- This unique structure of stamens is characteristic of the mustard family, scientifically known as Brassicaceae.
- The presence of both long and short stamens is a distinguishing feature of this family.

3. **Comparison with Other Families**:
- In other plant families, such as Solanaceae, Liliaceae, and Fabiaceae, all stamens are of equal length, which does not qualify them as having tetradynamic stamens.

4. **Conclusion**:
- Therefore, the correct answer to the question "Tetradynamous stamens are typical of" is the Brassicaceae family, which includes mustard plants.