Question

how is Sri Lanka separated from India​

Answer 1

Sri Lanka has never been part of India or the nations that now make up India except for a brief time under the Tamil Chola Empire and when Kalinga Magha invaded. In both cases, only the north and central parts of Sri Lanka were occupied. One of the reasons is that Sri Lanka is the only South Asian nation to have an unbroken written history of herself that goes back to 500 BC.