Assertion: The `C_(4)` plants have a speical type of leaf anatomy called kranz anatomy.
Reason: Chloroplasts of bundle sheath cells have well developed grana and starch grains.

Explanation

To analyze the given assertion and reason, we can break down the information step by step:

### Step 1: Understand the Assertion
The assertion states that "C4 plants have a special type of leaf anatomy called Kranz anatomy."

- **Explanation**: C4 plants, such as maize and sugarcane, exhibit a unique leaf structure known as Kranz anatomy. This structure is characterized by the arrangement of bundle sheath cells and mesophyll cells around the vascular bundles. The term "Kranz" means "wreath" in German, reflecting the circular arrangement of these cells.

### Step 2: Understand the Reason
The reason states that "Chloroplasts of bundle sheath cells have well-developed grana and starch grains."

- **Explanation**: In C4 plants, the bundle sheath cells contain chloroplasts that are involved in the Calvin cycle. However, these chloroplasts are agranal (they do not have well-developed grana) and are primarily responsible for starch storage. The mesophyll cells, on the other hand, do have well-developed grana and are involved in the initial fixation of carbon dioxide.

### Step 3: Evaluate the Truth of the Statements
- The assertion is **true**: C4 plants do have Kranz anatomy.
- The reason is **false**: While bundle sheath cells do contain starch grains, they do not have well-developed grana.

### Conclusion
Since the assertion is true and the reason is false, the correct answer is that the assertion is true but the reason is false.

### Final Answer
- **Assertion**: True
- **Reason**: False