The border formed by India and the country with whom India shares the longest border, forms the fifth-longest international border in the world. The country formed a part of India before it was partitioned in 1947. Complete Step by Step Answer - India shares international boundaries with Pakistan, Afghanistan, China, Nepal, Bhutan, Myanmar and Bangladesh. Among these, India shares the longest boundary with Bangladesh. a.China: China, officially referred to as the People’s Republic of China is a sovereign nation located in East Asia. It is the most populous country in the world. its capital is located in Beijing and Shanghai is it’s the largest city. It’s a one-party State and Xi Jinping is the country’s president. It has the second-largest GDP in the world. It shares a long boundary with India in its south and in India’s north. The Sino-Indian border is 4,056 km long. The line has been the source of many disputes between the two nations. b.Pakistan: Pakistan, the official name being the Islamic Republic of Pakistan is a country located in South Asia. The capital of the country is located at Islamabad. It was created in 1947 after the Partition of India. It is the world’s fifth-largest country population-wise. English and Urdu are the official languages there. Imran Khan is the country’s president. Pakistan shares a long border with India to its west and India’s east. It is 3,323 km long and it’s been a bone of contention between the two nations since their independence. It is referred to as one of the most conflict-ridden borders of the world. c.Bangladesh: Bangladesh with its capital at Dhaka, is a South Asian country. It is famous for its Sunderban Delta. In terms of population, it ranks 8th. Sheikh Hasina is the Prime Minister of the country. It was a part of Pakistan after India’s partition. However, in 1971 it fought a war and with India’s help left the Pakistani dominion and established itself as an independent nation with the name Bangladesh. India and Bangladesh share a 4,096-kilometre-long border, making it the fifth-largest international border in the world. Therefore India shares the longest border with Bangladesh. d.Myanmar: Myanmar, formerly known as Burma, is a Southeast Asian country. The capital of Myanmar is located at Naypyidaw. The largest city of Myanmar is Yangon. Win Myint serves as the country’s President. It shares borders with India, Bangladesh, China, Laos and Thailand. The India Myanmar border is 1,643 km long. Note: Bangladesh has the longest border with India for the reason that it is surrounded by India on three sides, i.e. in north, east and west. The other neighbours of India share the border only on one or two sides.