One of the southern neighbours of India is Sri Lanka.

McMahon Line is a border between India and China as a part of treaty signed in 1914. The line is named after Sir Henry McMahon, the then foreign secretary of the British Government in India.

Durand Line is the border that separates Afghanistan and Pakistan. It was established in the year 1893 after a memorandum of understanding between Mortimer Durand of British India and Amir Abdur Rahman Khan of Afghanistan.

Bangladesh is a South Asian country. Bangladesh is located towards eastern side of India. Bangladesh is surrounded by Indian states namely West Bengal, Tripura, Assam and Meghalaya and also by Burma. On one of the sides it has Bay of Bengal.

India is a large nation which shares border with many nations which include Pakistan, Myanmar, Bangladesh, Nepal, China. Among the given options, Sri Lanka does not share land border with India as it is separated by the Indian Ocean.

• Between Sri Lanka and India lies  the Palk Strait and Gulf of Mannar.
  
• Sri Lanka is an island country located to the south of India in Indian Ocean. Between India and Sri Lanka Park Strait is located. It is a strait located between Indian state of Tamil Nadu and Mannar district of Sri Lanka.
  
• The strait is named after Robert Palk, who was a governor of Madras Presidency.
  

• Indian subcontinent is the southern region of Asia consisting of areas starting from Himalayas towards Indian Ocean.
  
• It usually includes lands of Bangladesh, India, Pakistan Nepal, Bhutan, Sri Lanka, and the Maldives.
  
• From the given options china is the country that is not included in Indian sub-continent, these are also called as south Asian countries.
  

Bangladesh is a South Asian country. Bangladesh is located towards eastern side of India. Bangladesh is surrounded by Indian states namely West Bengal, Tripura, Assam and Meghalaya. Bangladesh is bordered on the west, north, and east by a 4,095 kilometres land frontier with India.

In terms of population, China is the most populous state in the world. India stands next to China. In 2014, China has approximate population of 1.39 billion in 2014 while India's population is 1.27 billion.

Indira point is a village located in the Nicobar district of Andaman and Nicobar Islands. It was previously called as Pygmalion Point and Parsons Point. It is the southernmost tip of India’s territory.

It was drowned by tsunami that hit on 26th January 2004. This was the first place drowned in the tsunami. 

On 17th August 1947 India and Pakistan border was demarcated. It was called the Radcliffe Line named after its architect Cyril Radcliffe. This border is present on east side between India and East Pakistan (presently Bangladesh) and on the west side again between India and West Pakistan.

• MacMahon line is a border between the countries of India and China as a part of a treaty signed in 1914.
  
• The line is named after Sir Henry McMahon, foreign secretary of the British-government in India.
  
• This line is present towards the east of the country.
  

Khyber Pass, Khyber also spelled Khaybar, or Khaibar. It is one of the important passes between Afghanistan and Pakistan. The pass connects Kābul with Peshāwar. The pass has historically been the gateway for invasions of the Indian subcontinent from the northwest. The name Khyber is also applied to the range of arid, broken hills through which the pass runs and which form the last spurs of the Spin Ghar (Safīd Kūh) Range. On either side of the connecting ridge are the sources of two small streams, the beds of which form the Khyber gorge. This narrow gorge forms the Khyber Pass; it winds between cliffs of shale and limestone, 600–1,000 feet (180–300 m) high, and enters the Khyber Hills from the Shadi Bagiār opening, a few miles beyond Jamrūd, Pak., and continues northwestward for about 33 miles (53 km). Just beyond the old Afghan fort of Haft Chāh, it opens onto the barren Lowyah Dakkah plain, which stretches to the Kābul River.

India shares its border with 7 countries namely Bangladesh, Bhutan, China, Myanmar, Nepal, Pakistan, and Sri Lanka, with Sri Lanka.