The correct answer is Sutlej.

• The origin source of the Sutlej is west of the catchment area of Lake Rakshastal in Tibet, like springs in an ephemeral stream.
  • Ungti Chu and Pare Chu rivers are tributaries of the Sutlej river.
  • It finally terminates in the Arabian Sea near the port city of Karachi, Pakistan.
  • Bhakra Dam, Karcham Wangtoo Hydroelectric Plant, and Nathpa Jhakri Dam are situated in the Sutlej River.

• Chenab River originates in the upper Himalayas in the Lahaul and Spiti district of Himachal Pradesh state.
  • The ancient name of the Chenab River is Chandrabhaga.
• Jhelum River is a tributary of the Chenab River.
  • It has a total length of 725 km.
  • The ancient name of the Jhelum is Vitasta.
  • The river Jhelum rises from Verinag Spring situated at the foot of the Pir Panjal in the southeastern part of the Kashmir Valley.
  • It ends 67 Kilometers from Mari Shah Sakhira City in a confluence with the Chenab River at Trimmu in the Jhang District.
• The Ravi River rises in the Bara Bhangal, District Kangra in Himachal Pradesh.
  • The total length of the river is about 725 kilometers.