| List-I (CGIAR centers) | List-II (Headquarter) |
| (A) International Institute of Tropical Agriculture (IITA) | (I) Nairobi, Kenya |
| (B) International Livestock Research Institute (ILRI) | (II) Battaramulla, Sri Lanka |
| (C) International Water Management Institute (IWMI) | (III) Beirut, Lebanon |
| (D) International Center for Agricultural Research in the Dry Areas (ICARDA) | (IV) Ibadan, Nigeria |
Each of these four organizations belongs to the CGIAR network of international agricultural research centers, and each has a fixed home city.
Putting these together gives (A)-(IV), (B)-(I), (C)-(II), (D)-(III).
Let's summarize:
So option (3) is the correct match.