Border

 India's states share the border :

Pakistan

 Jammu and Kashmir, Punjab, Rajasthan and Gujarat

Afghanistan 

Jammu and Kashmir

China 

Jammu and Kashmir,Himachal Pradesh, Uttrakhand, Sikkim and Arunachal Pradesh

Bangladesh 

Mizoram, Tripura, Assam, Meghalaya, West Bengal

Myanmar

Arunachal Pradesh, Nagaland, Manipur, Mizoram

Nepal 

Uttrakhand, Utter Pradesh,  Bihar,  West Bangal, Sikkim

Bhutan 

Sikkim,  West Bengal,  Assam,  Arunachal Pradesh.

Notes

•  Bangladesh and India share a 4096 km ,long international border, the fifth longest land border in the world
• Tripura is surrounded by Bangladesh from three sides. 
• Redcliffe  line  ---  India and Pakistani 
• Durand line  ---  India and Afghanistan 
• MacMohan line  ---  India and China