Concept: ECOWAS leadership is chosen through election among West African Heads of State at the Authority's ordinary sessions.
Explanation: President Bola Ahmed Tinubu of Nigeria was elected Chairman of the Economic Community of West African States (ECOWAS).
His election occurred at the 63rd ordinary session of the ECOWAS Authority of Heads of State and Government.
The session was held in Bissau, the capital city of the Republic of Guinea-Bissau.
President Tinubu assumed leadership of the 15-member regional body at that session.
The other options represent West African leaders, but none was the current chairperson when the session took place.
Alassane Ouattara is the President of Côte d'Ivoire, Macky Sall was the President of Senegal, and Nana Akufo-Ado is the President of Ghana.
Only Tinubu was elected as ECOWAS Chairman, making option A the correct choice.
Answer: A. Bola Ahmed Tinubu