Explanation:

• The disputed areas claimed by China in Bhutan are: North West part constitutes the Doklam, Sinchulung, Dramana and Shakhatoe in Samste, Haa and Paro districts. Central parts constitute the Pasamlung and the Jakarlung valley in the Wangdue Phodrang district.
• The Kongka Pass is a high mountain pass in Ladakh UT, of the Chang-Chemno Range on the Line of Actual Control between India and China.
• Sakteng Wildlife Sanctuary (SWS) is in eastern Bhutan’s Trashigang district bordering India and China. Recently China objected to a grant by Global Environment Facility to SWS claiming that the location was disputed.

Hence option 2nd is correct.