Which is the best option: CSE at IIIT Delhi, dual (economics) at BITS Goa/Hyderabad, or information technology at NIT Suratkal?

The answer to this question depends on how you can cope with zealous competition after joining college. If you are confident that you can join the brawl and top in your first year, I would highly recommend taking MSc in Economics at BITS Goa Pilani. 

• BITS Pilani has been ranked among top 30 institutes in NIRF Ranking 2020. 
• In your 2nd year, you can choose a B.E. course according to your first year CGPA, including the highly coveted CSE program.

• You'll have to spend one more year as compared to your B.E. colleagues.
• Getting your desired course can be a real disadvantage, seeing that there is no dearth of distractions on campus.

If you do not want to take a risk, choosing IT at NIT Surathkal is the best option for you. Since the syllabus almost corresponds to that of CSE and the infrastructure is mind-blowing at the campus.