Potato is a modification of

Options

A. stem
B. rhizome
C. root
D. leaf

Answer

To determine what potato is a modification of, we can analyze the options provided:

1. **Understanding the Structure of Potato**:
- The potato is commonly known as a tuber, which is a swollen part of a stem that stores nutrients.
- It grows underground and is an important food source.

2. **Identifying the Function of a Stem**:
- The primary function of a stem is to support the plant, conduct water and nutrients, and store food.
- In some plants, stems can modify to perform additional functions, such as storage.

3. **Comparing Options**:
- **Option A: Stem** - As discussed, potatoes are tubers that are modified stems.
- **Option B: Rhizome** - This is a type of underground stem that grows horizontally, but it is not what potatoes are.
- **Option C: Root** - Roots primarily absorb water and nutrients from the soil, and potatoes do not fall under this category.
- **Option D: Leaf** - Leaves are primarily for photosynthesis and do not store food like potatoes do.

4. **Conclusion**:
- Since potatoes are swollen stems that store food, the correct answer is **A: Stem**.

### Final Answer:
Potato is a modification of **A: Stem**.