Correct option is D
“Gobha Raja” is the titular king of the Tiwa community, an indigenous group in Assam
The Gobha Raja belongs to a Tiwa clan and his territory covers the Tiwa cultural realm, historically known as the Gobha principality
The title is recognized both by the Tiwa people and by the local administration, and the Gobha Raja plays a significant role in Tiwa cultural festivals such as the Jonbeel Mela
Historical records (Buranjis) and ethnographic accounts confirm that the Gobha Raja is not associated with the Ahom, Mishing, or Khamti communities
The Gobha Raja’s lineage and authority are integral to Tiwa identity and tradition, and the institution continues to be respected in contemporary times
So, the correct answer is(D) Tiwa.