The Satluj River originates from:

Mansarovar Lake in Tibet
Spiti Valley in Himachal Pradesh
Pir Panjal Range in Kashmir
Nepal

The Satluj River originates from Mansarovar Lake in Tibet. It is the longest of the five rivers that flow through the Indian state of Punjab. The Satluj River is a major tributary of the Indus River. It is a glacial river, which means that it is fed by melting snow and ice from the Himalayas. The Satluj River is a vital source of water for irrigation and drinking water for millions of people in India and Pakistan. It is also a popular destination for white-water rafting and other water sports.

The other options are incorrect because:

  • Spiti Valley is a valley in the Indian state of Himachal Pradesh. It is located in the Himalayas and is a popular tourist destination. However, the Satluj River does not originate from Spiti Valley.
  • Pir Panjal Range is a mountain range in the Indian state of Jammu and Kashmir. It is located in the Himalayas and is a popular destination for trekking and mountaineering. However, the Satluj River does not originate from Pir Panjal Range.
  • Nepal is a country in South Asia. It is located in the Himalayas and is a popular destination for trekking, mountaineering, and white-water rafting. However, the Satluj River does not originate from Nepal.