Concept:The 27 April 1960 referendum voted on making Ghana a republic instead of a constitutional monarchy.
Explanation:Before the referendum, Ghana had Queen Elizabeth II as its Head of State.
The 1960 referendum approved a new republican constitution.
So after the referendum, Ghana became a democratic state.
Kwame Nkrumah became President later, not Prime Minister.
The first political party had already been formed much earlier.
Queen Elizabeth II was never inaugurated as Prime Minister.
Answer:C. Ghana became a democratic state.