Hello Som Dutt,

There are plenty of opportunities, Many students choose this option. It depends on your interest & capability, If you have unquestionable research and writing skills then it is good for you. As you told that you are interested in Abroad, Then eligibility varies to the states & countries.

Firstly I would like to know what you have done in your qualification as you should be postgraduate for the research field & also you need to have GRE score to apply, It admission criteria varies.

Good Luck!