Muhammadu Buhari was re-elected as the president of which of the following country?

Muhammadu Buhari was re-elected Nigeria's President, results showed, after a delayed poll that angered voters and led to claims of rigging and collusion. Buhari, 76, took an unassailable lead of more than four million votes as the last states were yet to be declared, making it impossible for his nearest rival, Atiku Abubakar, to win.