Q. Which organisation recognized the Nagi bird sanctuary Site as an Important Bird and Biodiversity Area (IBA)?

Correct Answer: c) Bird Life International

Explanation:
Important Bird and Biodiversity Areas (IBAs) are identified and recognized by BirdLife International using standardized global criteria. Nagi Bird Sanctuary in Bihar has been designated as an IBA by BirdLife International (often in collaboration with national partners like BNHS in India). UNESCO and WWF do not designate IBAs.