Why the answer is B, and why the others tempt you.
**The reasoning**
Nigeria's journey to full sovereignty happened in **two stages**. On October 1, 1960, Nigeria gained **independence** from Britain but remained under the British monarchy with the Queen as head of state. We still had a Governor-General representing the Crown.
Three years later, on October 1, **1963**, Nigeria severed all constitutional ties with Britain and became a **republic** with Dr. Nnamdi Azikiwe as the first President (replacing the Governor-General). This is when we truly became masters of our own house.
**Why the wrong options tempt you**
- **1960** catches students who confuse independence with republic status. We gained freedom from colonial rule, but the Queen was still technically our head of state.
- **1979** was our Second Republic — when we returned to civilian rule after military coups.
- **1999** marked our Fourth Republic and return to democracy under Obasanjo.
**Quick takeaway**
**Independence (1960) = freedom from Britain; Republic (1963) = no more Queen, full sovereignty.** Think of it like moving out of your parents' house (independence) versus buying your own house (republic).
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