India's neighboring countries and terrestrial boundary line

 🔶Bangladesh

 🔷West Bengal, Assam, Meghalaya, Tripura, Mizoram

🔶China

🔷 Jammu & Kashmir, Punjab, Rajasthan, Gujarat

 🔶Pakistan

 🔷Jammu & Kashmir, Punjab, Rajasthan, Gujarat

🔶Nepal

🔷Uttarakhand, Uttar Pradesh, West Bengal, Sikkim, Bihar

🔶Myanmar

🔷Arunachal Pradesh, Nagaland, Manipur, Mizoram

 🔶 Bhutan

 Sikkim, West Bengal, Assam, Arunachal Pradesh

🔶Afghanistan

🔷Jammu and Kashmir (PoK)

 🔘 Radcliffe Line- This line separates India and Pakistan and India and Bangladesh.  Originally this Radcliffe line between India and Pakistan was determined by Sir Cyril Radcliffe in the year 1947.  At the time of the determination of this line.. 

 🔘McMahon Line - The McMahon Line separates India from China and was determined by Sir Henry McMahon in the year 1914.

 🔘Durand Line - Durand Line separates India from Afghanistan.  This line was determined by Sir Henry Mortimer Durand in the year 1896.