Which of the following is a partial root parasite ?

Options

A. Sandal wood
B. Mistletoe
C. Orobanche
D. Ganoderma

Explanation

### Step-by-Step Solution:

1. **Understanding Parasites**: A parasite is an organism that lives on or in a host organism and derives nutrients at the host's expense. In this context, we need to identify which of the given options is a partial root parasite.

2. **Identifying the Options**: The options provided are:
- Option 1: Sandalwood (Santalum album)
- Option 2: Mistletoe
- Option 3: Aurobanchae
- Option 4: Ganoderma

3. **Analyzing Each Option**:
- **Sandalwood (Santalum album)**: This is known to be a partial root parasite. It attaches to the roots of host plants and derives nutrients from them while still being capable of photosynthesis.
- **Mistletoe**: This is classified as a hemiparasite, which means it can photosynthesize but also derives some nutrients from its host.
- **Aurobanchae**: This is a holoparasite, meaning it does not perform photosynthesis and relies entirely on its host for nutrients.
- **Ganoderma**: This is a type of fungus that acts as a parasite but is not classified as a root parasite.

4. **Conclusion**: Based on the analysis, the organism that fits the definition of a partial root parasite is **Sandalwood (Santalum album)**.

5. **Final Answer**: The correct answer is **Option 1: Sandalwood (Santalum album)**.