Which river originates from ‘Rakshastal north-western tip’ near Mansarovar?

The correct option is Sutlej River.

Detailed Explanation:
1. Origin: The Sutlej River originates from the north-western tip of Lake Rakshastal, located in close proximity to Lake Manasarovar and Mount Kailash in Tibet (China). In the Tibetan language, it is referred to as Langqên Zangbo (meaning "Elephant River").
2. Entry into India: The river flows west-southwest and enters India through the Shipki La Pass in the Kinnaur district of Himachal Pradesh.
3. Significance: It is the longest and easternmost tributary of the Indus River system in the Punjab region. The renowned Bhakra Dam is constructed across the Sutlej River to create the Govind Sagar reservoir for hydroelectricity and irrigation.

Overview of Other Options:
• Ravi River: Originates in the Bara Bhangal area of Kangra district, near the Rohtang Pass in Himachal Pradesh.
• Narmada River: Originates at Amarkantak in the Anuppur district of Madhya Pradesh.
• Tapti River: Originates near Multai in the Betul district of Madhya Pradesh.