In a monocephalous executive system of government, all executive powers are vested in the

Step 1: Analyze the question The question asks who holds all executive powers in a monocephalous executive system.

Step 2: Explain the concept

• Mono = one, cephalous = head. A monocephalous (or single) executive means executive power is vested in one person rather than shared among a group.
• The opposite is a collegial or plural executive, where power is shared by a council or committee (e.g., the Swiss Federal Council).
• In a presidential system like Nigeria's, the President is both Head of State and Head of Government, so executive power rests in one individual.

Step 3: Evaluate the options

• A. Chief Justice: He heads the judiciary, not the executive. ✗
• B. President: A single person who holds all executive powers (e.g., Nigeria under the 1999 Constitution, Section 5). ✓
• C. Prime Minister: In a parliamentary system, the PM works with a Cabinet and shares collective responsibility. Also, the Head of State is usually a separate person (monarch or ceremonial president), so executive power is divided between two offices. ✗
• D. Speaker: He presides over the legislature. ✗

Step 4: Answer President**, and my working agrees. In a monocephalous executive, one person, the President, holds all executive powers.

Exam tip: Remember "Mono = One." Monocephalous = one head = President (single executive). If you see collegial or plural, think of executive power shared by a council.