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?

The Indus River originates from the northern slopes of the Kailash Range in Tibet, near Lake Manasarovar. It flows in a north-westerly direction through Tibet and enters India in Jammu and Kashmir.

The main tributaries of the Indus in India are Jhelum, Chenab, Ravi, Beas, and Sutlej.

Here's the confluence pattern:

• Jhelum and Ravi join Chenab.
• Beas joins Sutlej.
• Sutlej and Chenab merge to form Panjnad.
• Panjnad empties into the Indus River at Mithankot.

Therefore, Chenab is the only river among the options that directly joins the Indus River after collecting other tributaries.

Hence, the correct answer is Chenab.