The correct answer is B. Kinnaur.
Shipki La pass is a high mountain pass in the Himalayas on the India-China border. It is located in the Kinnaur district of Himachal Pradesh, India. The pass is at an elevation of 4,500 meters (14,800 feet) and is the highest motorable pass in Himachal Pradesh. The pass is open from May to October.
The pass is a popular tourist destination and is known for its scenic views of the Himalayas. The pass is also a major trade route between India and China.
Option A is incorrect because Solan is a district in Himachal Pradesh, but it is not located near the Shipki La pass.
Option C is incorrect because Chamba is a district in Himachal Pradesh, but it is not located near the Shipki La pass.
Option D is incorrect because Mandi is a district in Himachal Pradesh, but it is not located near the Shipki La pass.