Cuscuta is

Options

A. Saprophytic plant
B. Epiphytic plant
C. Mangrove
D. Parasitic plant.

Answer

### Step-by-Step Solution:

1. **Identify Cuscuta**: Cuscuta is commonly known as dodder. It is a type of plant that is characterized by its lack of leaves.

2. **Characteristics of Cuscuta**: Since Cuscuta plants do not have leaves, they are unable to perform photosynthesis, which means they cannot produce their own food.

3. **Nutritional Dependency**: Due to their inability to synthesize food, Cuscuta plants derive their nutrition from other plants, which are referred to as host plants.

4. **Structure of Cuscuta**: Cuscuta has thread-like structures called tendrils that wrap around the host plants. These tendrils help the plant attach to the host.

5. **Haustoria**: Cuscuta has small root-like projections called haustoria. These structures penetrate the tissues of the host plant to extract nutrients.

6. **Classification**: Cuscuta is classified as a parasitic plant because it relies on other plants for its nutrition.

7. **Elimination of Incorrect Options**:
- **Saprophytic Plant**: This type of plant derives nutrition from dead organisms, which does not apply to Cuscuta.
- **Epiphytic Plant**: These plants grow on other plants but do not derive nutrients from them, making this option incorrect.
- **Mangrove**: Mangroves are found in intertidal zones and are not related to Cuscuta.

8. **Conclusion**: The correct classification of Cuscuta is that it is a parasitic plant.

### Final Answer:
Cuscuta is a parasitic plant.