The term 'kranz' anatomy refers to

Options

A. Presence of large size chloroplasts in bundle sheath cells
B. Presence of thick walls in bundle sheath cells
C. Appearance of wreath of cells surrounding the vascular bundles in `C_4` leaf
D. Presence of three type of cells in leaves (palisade, spongy and bundle sheath ) in `C_4` leaf

Answer

### Step-by-Step Solution:

1. **Understanding the Term "Kranz Anatomy":**
- Kranz anatomy is a specialized structure found in the leaves of certain plants, particularly those that utilize the C4 photosynthetic pathway.

2. **Identifying the Key Features:**
- The key feature of Kranz anatomy is the arrangement of cells around the vascular bundles. In C4 plants, there is a distinct layer of cells that surround the vascular bundles.

3. **Analyzing the Options:**
- **Option A:** Presence of large size chloroplasts in a bundle sheath cell. (Not the defining feature of Kranz anatomy)
- **Option B:** Presence of thick walls in a bundle sheath cell. (Not specifically related to Kranz anatomy)
- **Option C:** Appearance of a breadth of cells surrounding a vascular bundle. (This is a characteristic feature of Kranz anatomy)
- **Option D:** Presence of three types of leaves in leaves that is a palisade, spongy, and bundle sheath in C4 leaves. (While C4 leaves have these types, it does not define Kranz anatomy)

4. **Selecting the Correct Answer:**
- Based on the analysis, the correct answer is **Option C**, which states that Kranz anatomy refers to the appearance of a breadth of cells surrounding the vascular bundles in C4 leaves.

### Final Answer:
The term 'Kranz anatomy' refers to the appearance of a breadth of cells surrounding the vascular bundles in C4 leaves (Option C).

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