Since your goal is to get into top IIMs (A, B, C) through the CAT route after graduation, and not through IPM, here’s the best option:

• Mata Sundari College (DU) – BA Economics Hons

Best for CAT prep: Delhi University has a strong academic base and gives enough time for CAT preparation.

Economics Hons is well respected by IIMs.

DU students often do well in CAT due to strong peer competition.

Low fee, great ROI.

• TAPMI BBA

Known for business exposure, but it’s a private institute, and TAPMI is more known for PGDM, not UG.

Costlier than DU.

You may be able to convert to their PGDM directly, but it won’t help for IIM A/B/C.

• Azim Premji University – BA Economics

Good for social sector and research.

Not ideal if you want corporate MBA via CAT.

Focus is more on development, not business.

• IIM Sambalpur BMS

It's new and doesn't have the brand weight like IIM A/B/C yet.

Since you’re not interested in IPM, this won’t align with your plan.