The OCR of the image is: --- OCR Start --- БУРКИНА- ФАСО кот- Д'ИВУАР ГАНА НИГЕР ЧА того БЕНИН ? ЭКВАТОРИАЛЬНАЯ ГВИНЕЯ CAH-TOME И ПРИНСИПИ КАМЕРУН ЦЕ ΑΦΙ PE --- OCR End ---

This image is a political map of West Africa. The question marks indicate an unknown country or region. The visible country names are:

• Burkina Faso
• Côte d'Ivoire
• Ghana
• Togo
• Benin
• Niger
• Cameroon
• Equatorial Guinea
• Sao Tome and Principe
• Chad (partially visible as 'CHA')
• Central African Republic (partially visible as 'ЦЕН АФИ PE')

The country marked with a question mark, located between Benin and Cameroon, and south of Niger, is Nigeria.

Answer: Nigeria