The `C_(4)`-plants are different from the `C_(3)`-plants with reference to the

Options

A. Type of pigments involved in photosynthesis
B. The number of NADPH that are consumed
C. End product
D. The substance that accepts `CO_(2)` in carbon assimilation and first stable product

Answer

### Step-by-Step Solution:

1. **Understanding C3 and C4 Plants**:
- C3 and C4 plants are two different types of plants that utilize different pathways for photosynthesis. C3 plants primarily use the Calvin cycle, while C4 plants utilize the Hatch-Slack pathway.

2. **Primary CO2 Acceptor**:
- In C3 plants, the primary acceptor of CO2 in the Calvin cycle is Ribulose bisphosphate (RuBP).
- In C4 plants, the primary acceptor of CO2 is Phosphoenolpyruvate (PEP).

3. **First Stable Product**:
- The first stable product formed in C3 plants during the Calvin cycle is a 3-carbon compound, specifically 3-phosphoglyceric acid (3-PGA).
- In C4 plants, the first stable product formed is a 4-carbon compound, oxaloacetic acid (OAA).

4. **Conclusion**:
- The key differences between C3 and C4 plants lie in the substance that accepts CO2 during carbon assimilation and the first stable product formed. Therefore, the correct reference for how C4 plants differ from C3 plants is regarding the substance that accepts CO2 in carbon assimilation and the first stable product.

### Final Answer:
The C4 plants are different from the C3 plants with reference to the substance that accepts CO2 in carbon assimilation and the first stable product.