Q. Which country ruled Bijni in Assam's Chirang district since the 17th century?
Answer:
Bhutan
Notes: Bijni is located in Chirang district under the Bodoland Territorial Council in Assam. It is part of the Eastern Duars, which were under Bhutanese control since the 17th century. The region lies on the northern bank of the Brahmaputra River at 53 meters elevation. Bhutan ruled this area before British annexation in the 19th century during the Duar Wars.