Correct option is: (B) Darbhanga
• Kusheshwar Asthan Bird Sanctuary consists of 14 villages that come under Kusheshwar Asthan block in Darbhanga
• It remains waterlogged most of the times. These wetlands are winter capital to at least 15 endangered species of migratory birds from places as far as Mongolia and Siberia.
• Under Wildlife Protection Act of 1972, these villages (spreading over 7019.75 acres) have been declared as Kusheshwar Asthan Bird Sanctuary.