In a parliamentary system of government, the legislature and executive are fused to ensure  .

Step 1: Analyze the question The question asks why the legislature and executive are fused (combined) in a parliamentary system, and what that fusion is meant to achieve.

Step 2: Explain the concept In a parliamentary system (e.g., the United Kingdom), the Prime Minister and ministers are usually members of the legislature (Parliament). This is called fusion of powers, as opposed to the separation of powers in a presidential system like Nigeria's.

The main purpose of this fusion is cooperation and harmony between the lawmaking arm and the executive arm. Because the people who make the laws are largely the same people who carry them out, there is less deadlock, and policies pass and are implemented quickly. This gives smooth and efficient administration.

Step 3: Check each option

• A. Supremacy of the ruling party: A ruling party may end up dominant, but that is a side effect, not the purpose of the fusion. The system is not designed to ensure party supremacy.
• B. Smoothness in the administration of the state: Correct. Fusion reduces conflict between the arms and speeds up governance.
• C. The constitution is read in parliament at all times: Irrelevant. Fusion has nothing to do with reading the constitution.
• D. The judiciary consults parliament before ruling: Wrong. The judiciary remains independent, and fusion concerns only the legislature and executive.

Step 4: Answer The correct answer is B. smoothness in the administration of the state.

Tip: Link the keywords to each other:

• Fusion of powers → cooperation → smooth governance
• Separation of powers → checks and balances → possible deadlock

When an exam question asks about the purpose of fusion, look for words like "harmony," "cooperation," "efficiency," or "smoothness."