Assertion (A): In federal set up sovereignty is divided between the Central and Provincial government.
Reason (R): The powers of the government are divided in a federal set up.

The correct answer is **B. Both A and R are true and R is correct explanation of A**.

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### **Explanation:**

1. **Assertion (A) is TRUE:**
* In a true federal setup, **sovereignty is constitutionally divided** (or shared) between the central/national government and the constituent units (states or provinces). Each level of government possesses autonomous, sovereign power in its respective domain granted directly by the constitution.


2. **Reason (R) is TRUE:**
* A fundamental defining feature of federalism is the **division of legislative, executive, and administrative powers** between the central authority and regional governments through a written Constitution (e.g., Union, State, and Concurrent Lists).


3. **Is R the correct explanation of A?**
* **Yes.** Sovereignty is split between the central and provincial levels *precisely because* the Constitution divides sovereign governmental powers between them, making each level independent and supreme within its own allocated sphere.