With reference to the Indus river system, of the following four rivers

With reference to the Indus river system, of the following four rivers, three of them pour into one of them which joins the Indus direct. Among the following, which one is such river that joins the Indus direct?

Chenab
Jhelum
Ravi
Sutlej
This question was previously asked in
UPSC IAS – 2021
Among the given options, the Sutlej is the river that joins the Indus direct, receiving waters from the other major tributaries indirectly.
– The Indus River system consists of the main Indus River and its major tributaries: Jhelum, Chenab, Ravi, Beas, and Sutlej. These five tributaries flow through the Punjab region.
– The Jhelum River flows into the Chenab River.
– The Ravi River flows into the Chenab River.
– The Beas River flows into the Sutlej River (in India).
– The Chenab River (carrying the waters of Jhelum and Ravi) then joins the Sutlej River near Uch Sharif in Pakistan.
– The combined river, known as the Panjnad (“Five Rivers”), flows for a short distance before joining the Indus River at Mithankot, Pakistan.
– Thus, the Sutlej is the river among the options that receives the waters of the other three (Jhelum and Ravi via Chenab, and Beas – though Beas is not in the list of options, it joins Sutlej before the confluence with Chenab) and then joins the Indus as the Panjnad.
– The wording “three of them pour into one of them which joins the Indus direct” is a bit simplified. Jhelum and Ravi pour into Chenab. Chenab pours into Sutlej. Sutlej (combined with Beas) then joins the Indus. The Sutlej forms the final major confluence (Panjnad) with the Indus.
The Indus Water Treaty between India and Pakistan allocates the waters of the eastern rivers (Ravi, Beas, Sutlej) to India and the western rivers (Indus, Jhelum, Chenab) to Pakistan.