Four sepals `K_(4)` or (2 + 2) is the characteristic feature of the family :

Options

A. Solanaceae
B. Malvaceae
C. Papilionaceae
D. Brassicaceae

Answer

To solve the question regarding which plant family has the characteristic feature of four sepals (K₄) or (2 + 2), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which plant family is characterized by having four sepals, represented as K₄ or (2 + 2).

2. **Identify the Options**: The options given are:
- Solanaceae
- Malvaceae
- Papilionaceae
- Brassicaceae

3. **Analyze Each Family**:
- **Solanaceae**: This family typically has five sepals.
- **Malvaceae**: This family also usually exhibits five sepals.
- **Papilionaceae**: Members of this family generally have five sepals as well.
- **Brassicaceae**: This family, also known as the mustard or cruciferous family, is characterized by having four sepals, which can be arranged in two whorls (2 + 2).

4. **Conclusion**: Since Brassicaceae is the only family among the options that has four sepals (K₄ or 2 + 2), it is the correct answer.

5. **Final Answer**: The correct option is **Brassicaceae**.