Hello Varun,

Let me tell you, You can do B.Sc degree which is similar to geaduation and of almost similar level to Diploma, although with just diploma, there are not much chances that you can get admitted to a university for M.Sc(PG in Science). Universities demand a B.Sc(Bachelors degree) before you apply for M.Sc, therefore I suggest you to do an AMIE, which is a similar course. Completing your AMIE along with diploma, will very well make you eligible for any post graduation.

In case of any doubts, you may refer to the eligibility criteria for M.Sc for any particular university.

Hope this Helps.

Regards