The green flattened stem of Opuntia is called :

Options

A. cladode
B. phylloclade
C. phyllode
D. offset

Explanation

To answer the question about the green flattened stem of Opuntia, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Plant**: Recognize that Opuntia is a genus of cacti, commonly known as prickly pear.

2. **Understand the Structure**: In Opuntia, the green flattened stem is a specialized structure that performs photosynthesis, similar to leaves.

3. **Define Key Terms**:
- **Cladode**: A term that refers to a modified internode that takes on a leaf-like function.
- **Phylloclade**: A modified stem that also functions as a leaf.
- **Phyllode**: A modification of petioles that resembles a leaf.
- **Offset**: A small daughter plant produced asexually.

4. **Analyze the Options**:
- Cladode and phylloclade both refer to modified stems that serve a leaf-like function.
- Phyllode refers specifically to petiole modifications and does not apply here.
- Offset is unrelated as it refers to a reproductive structure.

5. **Select the Correct Answer**: The green flattened stem of Opuntia is best described as a **phylloclade**, which is a modified stem that functions like a leaf.

### Final Answer:
The green flattened stem of Opuntia is called a **phylloclade**.