The plant of arid regions with flat green stem carrying out photosynthesis is

Options

A. Euphorbia
B. Opuntia
C. Citrus
D. Bougainvillea

Answer

To solve the question, "The plant of arid regions with flat green stem carrying out photosynthesis is," we can follow these steps:

### Step 1: Understand the Characteristics of the Plant
- The question specifies that we are looking for a plant that is found in arid regions, has a flat green stem, and is capable of photosynthesis.

### Step 2: Analyze the Options
- The options provided are:
1. Euphorbia
2. Opuntia
3. Citrus
4. Bougainvillea

### Step 3: Identify the Plant Types
- **Euphorbia**: This is a diverse genus that includes some succulent plants, but not all have flat green stems.
- **Opuntia**: This is a genus of cacti known as prickly pears. They have flat, fleshy pads that are green and perform photosynthesis.
- **Citrus**: This refers to fruit-bearing trees and shrubs, which do not have flat green stems.
- **Bougainvillea**: This is a flowering plant with woody stems and does not fit the criteria.

### Step 4: Confirm the Correct Answer
- Among the options, **Opuntia** (option 2) is the only plant that has a flat green stem and is adapted to arid conditions, making it capable of photosynthesis.

### Conclusion
- Therefore, the correct answer is **Opuntia**.

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