1: The win comes after a long history of military rule , coups and botched attempts at democracy in Africa 's most populous nation . 2: He will take the helm at a critical time , as Nigeria grapples with Boko Haram , serious economic woes and corruption . 3: Nigeria is the most populous country in Africa and is grappling with violent Boko Haram extremists .
1: Africa 's most populous nation 2: Nigeria 3: the most populous country in Africa