Which family is characteristic representative of monocotyledonous plants ?

Options

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

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks for the family that is a characteristic representative of monocotyledonous plants. Monocots are plants that have seeds with a single cotyledon.

2. **Identifying the Options**: The options provided are:
- A) Liliaceae
- B) Solanaceae
- C) Fabaceae
- D) Brassicaceae

3. **Analyzing Each Family**:
- **Liliaceae**: Known as the lily family, it includes plants like tulips, gloriosa, asparagus, aloe, and colchicine. This family is characterized by perennial herbs with underground bulbs, corms, or rhizomes. A key feature is the presence of tepals, where sepals and petals are not distinct.
- **Solanaceae**: Known as the nightshade family, includes plants like potatoes and tomatoes. This family is not exclusively monocot.
- **Fabaceae**: Known as the legume family, includes beans and peas. This family is also not monocot.
- **Brassicaceae**: Known as the mustard family, includes plants like mustard and cabbage. This family is dicotyledonous, not monocot.

4. **Conclusion**: Based on the analysis, Liliaceae is the only family among the options that is characteristic of monocotyledonous plants.

5. **Final Answer**: The correct answer is **A) Liliaceae**.