Spiny leaf margins are found in

Options

A. Opuntia
B. Papaver
C. Argemone
D. Polyalthia.

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks about the plant that has spiny leaf margins among the given options: Opuntia, Papaver, Argemone, and Polyalthia.

2. **Analyze Each Option**:
- **Opuntia**: This plant is known for having spines, but these are modifications of the leaves into spines, not spiny leaf margins.
- **Papaver**: This plant does not have spines or spiny leaf margins.
- **Argemone**: This plant is characterized by spiny leaf margins. It is an erect spiny herb that can grow up to 1 meter tall. The leaves are alternate, without leaf stalks, toothed, and have spiny margins.
- **Polyalthia**: Similar to Papaver, this plant does not exhibit spiny leaf margins.

3. **Conclusion**: Based on the analysis, the plant that has spiny leaf margins is **Argemone**.

4. **Final Answer**: The correct option is **Argemone**.

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