Concept:The Sokoto Caliphate was led after Usman dan Fodio by his son and close associate.
Explanation:Usman dan Fodio established the Sokoto Caliphate after the Fulani Jihad.
Upon his death in 1817, the caliphate needed a new head.
His son, Muhammadu Bello, succeeded him as the leader.
Muhammadu Bello had already played a major role in the jihad and administration.
Therefore, among the listed leaders, Muhammadu Bello is the correct successor.
Answer:B. Muhammadu Bello