Step 1: Understanding the question.
This question refers to the tributaries (shnat wah) — smaller rivers that join or branch out from a main river.
It is based on Khasi geography and the study of natural landmarks mentioned in Khasi literature.
Step 2: About Wah Myntdu.
Wah Myntdu is one of the most important rivers in the Jaintia Hills region.
It flows near Jowai and is known for its connection with various local streams and sub-tributaries.
The five tributaries mentioned — Dwara, Umtang, Kumarjani, Prasbiria, and Umtarsa — all originate from or merge into Wah Myntdu.
Step 3: Elimination of incorrect options.
- (1) Wah Umngot — famous for its crystal-clear water near Dawki but not linked with these five tributaries.
- (3) Wah Umïew — another major river but unrelated to these specific sub-streams.
- (4) Umiām Khwan — associated with Umiam reservoir near Shillong, not Jaintia region.
Thus, the correct main river is Wah Myntdu.
Step 4: Cultural and geographical importance.
In Khasi geography and folklore, Wah Myntdu represents life, fertility, and natural harmony.
It supports agricultural and cultural practices of the Jaintia community.
Step 5: Conclusion.
Therefore, the five tributaries mentioned belong to the river Wah Myntdu.