Hello

First of all I would like to tell you- it  depends on what you like the most. If you like the subject then you will do good at it.

That being said, I will give you a gist of the three options so you can choose for yourself , which choice suits you the most.

Fergusson- Ranked 7 for Science by The Week, the placements of the college depends on the subject you get for BSc however the placement scenario for any bachelors subject (science) is not as great as BTech (you might have to do MMSc or even PhD or atleast qualify NET to get one lakh a month package). The infrastructure, environment and faculty is top notch and over all it is a dream college for those who like Science.

VIT Pune- Ranked 18 for engineering by Times 2020, this collge provies good placements in chemical engineering to 70-80% of the students. The teachers are helpful (with most having a phd from iits).  The highest package offered revolves around 8 LPA and the average package offered is 3 lpa.

Cummins- Ranked 56 by The Week 2020, this college has good placement record overall however it is a bit low in Eand TC.The average package offered is around 4-5 LPA (better than VIT) in companies like Avaya, Cisco, Honeywell, Infosys, Wipro etc. The faculty and infrastructure are both great and the extra curricular activities are good. The overall environment is student friendly.