Question

MacMohan Line demarcates the boundary between _____________.
1. India and Pakistan
2. India and China
3. India and Nepal
4. India and Bangladesh

Answer 1

Hint :The line of demarcation is named after Henry McMohan, who was a foreign secretary of Chief Negotiator of the convention, which was held at Simla and British India.
In 1988, India's Prime Minister, Rajiv Gandhi, visited China and agreed to a joint working group on border issues that made little noticeable positive progress.

Complete answer :
The boundary of MacMohan extends for about 550 miles (890 km), which covers several places from Bhutan on the western side to 160 miles (260 km) on the eastern side of the Brahmaputra River.
Without the participation of the Chinese government, this line was a negotiation between India and Tibet; during the MacMohan line negotiation, the Chinese delegate Ivan Chan was not an authorized member. Before the demarcation, the Tawang region of Arunachal Pradesh was known as South Tibet.
The MacMohan Line demarcates the boundary between India and China, and this demarcation line is drawn on the map, which is referred to in the Simla Convention. Simla convention is a treaty between Britain and Tibet; this treaty was signed in 1914.
This demarcation line is the effective boundary between China and India, despite its legal status being disputed.
India's Bushing is the closest to the MacMohan line, and this demarcates China'sChina's Tibet region and Arunachal Pradesh.

Option 2, is the correct answer.

Note :
The Population of the Bushing village is 100; the Memba tribe people stay in this village. India took control over Tawang when Tibet lost its status as an independent territory in the year 1950.
On behalf of the Tibetan Government, it was signed by McMahon and Lonchen Satra.
From Bhutan in the west, it stretches for 890 kilometers mostly along the Himalayan crest.