Concept:In 1963, Nigeria's head of government was the Prime Minister, not the President.
Explanation:Nigeria used the Westminster system after independence in 1960.
The Prime Minister was the head of government, while the President was the ceremonial head of state.
In 1963, Alhaji Abubakar Tafawa Balewa served as Prime Minister.
Therefore, he was the head of government at that time.
Chief Nnamdi Azikiwe was the ceremonial President, not the head of government.
Answer:C. Alhaji Abubakar Tafawa