EXPLANATION:

Largest State Rajasthan 342,239 Sq km

Smallest State Goa 3,702 Sq km

Largest Union Territory Andaman & Nicobar Islands 8,249 Sq km

Smallest Union Territory Lakshadweep 32 Sq km

Largest District Kachchh (Gujarat) 45,652 Sq km

Bangladesh Bangladesh 4,096 kilometres (2,545 mi) Border Security Force Most India–Bangladesh ENCLAVES exchanged in 2015.

Bhutan Bhutan 578 kilometres (359 mi)[2] Sashastra Seema Bal OPEN border

China China 3,488 kilometres (2,167 mi) Indo-Tibetan Border Police and Special Frontier Force Also see McMahon Line.

Myanmar Myanmar 1,458 kilometres (906 mi) Assam Rifles and Indian Army Also see India-Myanmar barrier

Nepal Nepal 1,752 kilometres (1,089 mi)[3] Sashastra Seema Bal Open border.

Pakistan Pakistan 3,310 kilometres (2,060 mi) Border Security Force Also see Radcliffe Line, Operation

India, with its claim of a 12-nautical-mile (22 km; 14 mi) territorial maritime zone and 200-nautical-mile (370 km; 230 mi) exclusive economic zone, has a more than 7,000-kilometre (4,300 mi) maritime

Meghdoot and Sir Creek.

Afghanistan Afghanistan 106 kilometres (66 mi) Border Security Force Source MHA.

Sri Lanka Sri Lanka 0.1 kilometres (0.062 mi) Border Security Force Also see Adam's Bridge.