Concept:From 1957 to 1960, Ghana was still a Commonwealth realm under the British Crown.Explanation:Ghana gained independence in 1957 but did not become a republic until 1960.During 1957–1960, the Head of State was Queen Elizabeth II, represented in Ghana by a Governor-General.Kwame Nkrumah was Prime Minister, not Head of State, during this period.Answer:B. Queen of Britain