Which one is the incorrect match?

Options

A. Phylloclade - Opuntia
B. Stem thorn - Citrus
C. Rhizome - Potato
D. Com - Zaminkand

Answer

To determine the incorrect match among the given options, we will analyze each pair one by one:

1. **Phylloclad and Opuntia**:
- A phylloclad is a modified stem that can be flat or cylindrical and is capable of photosynthesis.
- Opuntia, commonly known as the prickly pear cactus, has flat stems that perform photosynthesis.
- Therefore, this is a correct match.

2. **Stem Thorn and Citrus**:
- In citrus plants, the thorns are indeed modified stems.
- These thorns are sharp and pointed structures that develop from the stem.
- Thus, this is also a correct match.

3. **Rhizome and Potato**:
- A rhizome is a type of underground stem that grows horizontally.
- However, potato is not a rhizome; it is a tuber, which is a swollen part of a stolon (a modified stem).
- Therefore, this is an incorrect match.

4. **Comb and Jamekant**:
- In the case of Jamekant (also known as Jamun or Syzygium), the stem modification is referred to as a comb.
- This is a correct match.

Based on the analysis, the incorrect match is:

**Rhizome and Potato**.

### Final Answer:
The incorrect match is **Rhizome and Potato**.