What is the correct combination of crops grown in the area shaded on the map of Nigeria above?

1. Yam 2. Sugar 3. Wheat 4. Maize 5. Millet 6. Onion

• A 1, 4, 5
• B 3, 5, 6
• C 1, 2, 4
• D 2, 3, 4
• E 4, 5, 6