Consider the map given below : The red line in the map is the

The red line on the map from the 1996 IAS exam represents the route followed by the Younghusband Expedition (1903–1904). Led by Colonel Francis Younghusband under the instructions of Lord Curzon, this British military mission was sent to Tibet to establish diplomatic and trade relations and to counter perceived Russian influence.

• The Route: The path shown originates in Sikkim (passing through Kalimpong/Gangtok), crosses into the Chumbi Valley, continues to Gyantse, and terminates at Lhasa.
• Other Options: The Durand Line is the border between Afghanistan and Pakistan. The MacMahon Line is the boundary between Northeast India (Arunachal Pradesh) and Tibet, located east of Bhutan. The Radcliffe Line refers to the 1947 borders between India and Pakistan.