Why the answer is B, and why the others tempt you.
**The reasoning**
Nigeria became a Republic on October 1, 1960, but the governmental structure changed in 1963. From 1960–1963, Nigeria had a **Prime Minister** (the head of government) and a **Governor-General** (representing the British monarch).
When Nigeria became a **full Republic in 1963**, the position of **President** was created as head of state. **Nnamdi Azikiwe** became Nigeria's first President then, serving from 1963–1966.
**Why the wrong options tempt you**
- **Tafawa Balewa (A)** was Nigeria's first *Prime Minister* (1960–1966), not President. Many students confuse these two positions because both were "first leaders" at independence.
- **Obafemi Awolowo (C)** and **Ahmadu Bello (D)** were prominent nationalist leaders and regional premiers, but neither held the presidential office.
The key distinction: **Prime Minister ≠ President**. Different roles, different times.
**Quick takeaway**
Remember: "Azikiwe was President; Balewa was Prime Minister" — both were crucial leaders, but President came later in 1963 when Nigeria ditched the monarchy system.
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