In `C_4` plants ,

Options

A. grana is present in mesophyll cells and absent in bundle sheath cells.
B. grana is absent in mesophyll cells and present in bundle sheath cells.
C. grana is present in both mesophyll and bundle sheath cells.
D. grana are absent in both mesophyll and bundle sheath cells.

Answer

To solve the question regarding the characteristics of C4 plants, we will analyze the provided options step by step.

### Step 1: Understand the Structure of C4 Plants
C4 plants have a unique leaf anatomy known as Kranz anatomy. In this structure, there are two types of cells involved in photosynthesis: mesophyll cells and bundle sheath cells.

### Step 2: Analyze the Options
1. **Option 1**: Grana is present in the mesophyll cells and absent in the bundle sheath cells.
- **Analysis**: This statement is correct. In C4 plants, the mesophyll cells contain chloroplasts with grana (stacks of thylakoids), while the bundle sheath cells have chloroplasts that lack grana and are more starch-rich.

2. **Option 2**: Grana is absent in the mesophyll cells and present in bundle sheath cells.
- **Analysis**: This statement is incorrect. As mentioned, mesophyll cells have grana, while bundle sheath cells do not.

3. **Option 3**: Grana is present in both mesophyll and bundle sheath cells.
- **Analysis**: This statement is also incorrect. Only mesophyll cells have grana.

4. **Option 4**: Grana is absent in both mesophyll and bundle sheath cells.
- **Analysis**: This statement is incorrect as well. Grana are present in mesophyll cells.

### Step 3: Conclusion
Based on the analysis, the correct answer is **Option 1**: Grana is present in the mesophyll cells and absent in the bundle sheath cells.