Locations related to Chinese intrusions

Why in news?

• A number of location in north eastern India has been seen in news due to Chinese intrusions in the region.

List of Locations:

• Bum La Pass: The Bum La Pass is a border pass between Tibet's Cona County and India's Tawang district in Arunachal Pradesh. It is 37 km away from the town of Tawang and 43 km from the town of Cona (Tsona Dzong). The pass currently serves as a trading point between Tawang and Tibet.
• Tsari Chu Valley: Tsari Chu is one of the three streams that join to form the Subansiri river. Parts of the valley that are occupied by Chinese is part of the Upper Subansiri district of Arunachal Pradesh.
• Tulung La: Located in Arunachal Pradesh, 4 Assam Riffles jawans were killed here when their patrol was ambushed by Chinese soldiers on October 20, 1975.
• Sumdorong Chu valley : It is a river vally in Arunachal Pradesh that was the site of a standoff between India and China in 1986–1987 which, despite giving rise to the fears of another war, got deescalated successfully.

PRELIMS QUESTION

Consider the following mountain passes:
1.Diphu pass
2.Lipulekh pass
3.Banihal Pass
Which of the passes given above are located at or close to trijunctions of India and two other countries? 
(a) 1 and 2 only
(b)2 and 3 only
(c)3 only
(d)1,2 and 3

Answer to Prelims Question