Complete parasite among the following

Options

A. Rafflesia
B. Viscum
C. Striga
D. Vanda

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks to identify a complete parasite from the given options. A complete parasite is a plant that relies entirely on its host for nutrients and does not perform photosynthesis.

2. **Analyzing the Options**:
- **Option A: Rafflesia**: This is known to be a complete parasite. It attaches to the host plant and derives all its nutrients from it, lacking chlorophyll and not performing photosynthesis.
- **Option B: Viscum**: This is a partial parasite. It can photosynthesize and only relies on the host for water and minerals.
- **Option C: Striga**: This is also a partial parasite. It connects to the roots of host plants and absorbs nutrients but can perform some photosynthesis.
- **Option D: Vanda**: This is an epiphytic plant that does not parasitize other plants and is not a parasite at all.

3. **Conclusion**: Based on the analysis, Rafflesia is the only complete parasite among the options provided. Therefore, the answer is **Option A: Rafflesia**.