Linked from
The 6 pages that link to Eastern Himalaya, each with the reason it gives.
BhutanNarrower topic: Bhutan’s steep terrain belongs to this broader mountain region.
Arunachal PradeshNarrower topic: Arunachal Pradesh occupies much of this mountainous region.
SikkimNarrower topic: Sikkim’s terrain and biodiversity belong to this wider mountain region.
GangtokNarrower topic: Gangtok occupies a ridge in this mountain region.