Hey Nikhil,

Hope you are doing well !

To answer your question, NO. All the students of premier B-schools in India do not have the above criteria. Though they are preferred, but what all the students have is a good profile, with good academics, and good co-curricular and extra-curricular.

Also, having work-ex is not mandatory, though it would help you is B-schools.

Hope my answer helped you. Please let me know in case of any further queries.