Phyllodes are seen in
I) Nepenthes II) Australian acacia III) Opuntia

Options

A. I only
B. I and II only
C. I, II, III
D. I and III only

Answer

To determine which of the given plants exhibit phyllodes, we need to analyze each option based on the definition and characteristics of phyllodes.

### Step-by-Step Solution:

1. **Understanding Phyllodes**:
- Phyllodes are modifications of the leaf petiole, where the petiole becomes flattened and performs the function of photosynthesis instead of the leaf blade (lamina).

2. **Analyzing Nepenthes**:
- Nepenthes, commonly known as pitcher plants, have modified leaves that form pitcher-shaped structures to trap insects. The actual leaf blade is not performing photosynthesis; instead, the petiole is expanded and takes over the photosynthetic role.
- **Conclusion**: Nepenthes exhibits phyllodes.

3. **Analyzing Australian Acacia**:
- Australian Acacia is adapted to dry habitats. In these plants, the leaves are often reduced to spines to minimize water loss, and the petiole is flattened and expanded to carry out photosynthesis.
- **Conclusion**: Australian Acacia also exhibits phyllodes.

4. **Analyzing Opuntia**:
- Opuntia, or prickly pear, has modified stems that are flattened and green, which perform photosynthesis. However, in this case, it is the stem that is modified, not the leaf petiole.
- **Conclusion**: Opuntia does not exhibit phyllodes; instead, it has a structure called phylloclade.

5. **Final Answer**:
- Based on the analysis, the plants that exhibit phyllodes are:
- I) Nepenthes
- II) Australian Acacia
- Therefore, the correct answer is **I and II**.