Geography of Nigeria

What is the most populous urban area in Sub-Saharan Africa?

What language has the most native speakers in the above?

What is the name of the main business and financial center of that city?
(Namesake of a British monarch)

What is the national capital of Nigeria?

What country shares the longest border with Nigeria?

What is the smallest country Nigeria borders?

What is the longest river in Nigeria?

What walled city is the most populous urban area in northern Nigeria?

What name is given to the Nigerian film industry?

What ocean gulf does Nigeria border?

On what lake, bordering northeastern Nigeria, does the city of Baga lie?

What type of tuber, that resembles a sweet potato, is the staple crop of Nigeria?

What city is considered to be the capital of the oil industry of Nigeria?

What religion do the majority in northern Nigeria follow?

What is the currency of Nigeria?

What ethnic group, starting with H, is the largest one in northern Nigeria?

By what name is Nigeria often referred to as?

What was the most populous urban area in Nigeria at the time of its independence in 1960?

What former independent country existed in southeastern Nigeria between 1967–1970?

What ethnic group, starting with F, are widely dispersed across
West Africa - but most of them live in Nigeria?