Number of arms of government.

**The reasoning** Nigeria operates a **separation of powers** system with **three arms of government**: 1. **Legislative** (makes laws) — National Assembly: Senate + House of Representatives 2. **Executive** (implements laws) — President, Vice President, Ministers, civil service 3. **Judicial** (interprets laws) — Supreme Court, Court of Appeal, lower courts This three-arm structure creates checks and balances, preventing any single group from having total power. It's borrowed from democratic systems like the USA and enshrined in the 1999 Constitution. **Why the wrong options tempt you** - **A (2)**: You might think "government vs. opposition" or confuse "levels of government" (federal, state, local) with "arms." - **C (4) or D (5)**: Easy to add extra bodies like "the media" (fourth estate) or "civil service" — but these *support* the arms; they aren't separate arms themselves. **Quick takeaway** Remember **L-E-J**: **L**egislative makes it, **E**xecutive does it, **J**udicial judges it — always three arms working as checks on each other.