Fence : Guess where ?

It is about 3, 800 kilometres in Length ..

                                     

Hint : A legacy of the 1947 partition when the British left the subcontinent.

In 2011, Delhi and Dhaka signed a treaty to resolve the issue of disputed enclaves.

It was agreed that the residents of these pockets would have the option to choose

the country they wanted to live in :

but it has not been enforced yet.