The river Sutlej, on which the Bhakra Dam has been built, originates from

The correct answer is: B. near Bara Lacha Pass in Lahul.

The Sutlej River is a trans-boundary river that flows through India and Pakistan. It is one of the five major rivers of the Indus River system. The Sutlej River originates from a spring near Bara Lacha Pass in Lahul, India. The river flows for about 1,500 kilometers before it joins the Indus River in Pakistan. The Sutlej River is an important source of water for irrigation and drinking water in both India and Pakistan.

The other options are incorrect for the following reasons:

• Option A is incorrect because the Sutlej River does not originate from a spring in Vering.
• Option C is incorrect because the Sutlej River does not originate from Rakas lake in Tibet.
• Option D is incorrect because the Sutlej River does not originate from Mansarovar lake.