Sheikh Khalifa bin Salman Al Khalifa has died at age of 84, He was one of the world’s long-serving Prime Minister of which nation?

Question

Accepted Answer

Bahrain. Bahrain is correct because Sheikh Khalifa bin Salman Al Khalifa was a long-serving Prime Minister of Bahrain. Kuwait is incorrect because he was not the PM of Kuwait. Nigeria is incorrect because he was not associated with Nigerian politics. Qatar is incorrect because he was not the PM of Qatar.