A genus which has both `C_(3)` and `C_(4)` species is

Options

A. Ricinus
B. Atriplex
C. Euphorbia
D. Both B and C.

Answer

To answer the question, "A genus which has both C3 and C4 species is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand C3 and C4 Plants**:
- C3 plants are those that utilize the C3 carbon fixation pathway, converting carbon dioxide into a three-carbon compound called 3-phosphoglycerate.
- C4 plants, on the other hand, fix carbon dioxide into a four-carbon compound, specifically oxaloacetic acid, before entering the Calvin cycle.

2. **Identify the Options**:
- The options provided are:
- A) Racinus
- B) Arteplex
- C) Euphorbia
- D) Both B and C

3. **Analyze Each Option**:
- **Racinus**: This genus is primarily known for C3 species.
- **Arteplex**: This genus includes both C3 and C4 species.
- **Euphorbia**: This genus also includes both C3 and C4 species.

4. **Determine the Correct Answer**:
- Since both Arteplex and Euphorbia contain species from both C3 and C4 pathways, the correct answer is option D, which states "Both B and C".

5. **Final Answer**:
- The correct answer is **D) Both B and C (Arteplex and Euphorbia)**.