CBSE 12th

Hello Shahid,
Your chances are really high to get ECE with 98.1% in board exam and 116 in JEE Mains. The tuition fee structure is 55,000/- per semester and the hostel fees will be around 10000-15000/- per annum and mess fee will be a maximum of 10000/- only.
So for a year, the overall fees will be 1,50,000-1,80,000 INR only.

Kindly use this WBJEE college predictor tool to know more insights about the available colleges.
https://www.shiksha.com/b-tech/resources/wbjee-college-predictor

Medicine is found to be the most preferred option after +2 PCB with MBBS at the top of the list followed by BDS, BHMS, BAMS, BVSc, B.Sc Nursing, B.Sc Agriculture and Forestry. Food Science/Technology and so on. B.Sc in Science is also a preferred option. Biotechnology, Bio-Informatics, Nutrition and Dietetics, Home Science, etc., are also opted by many.

Medicine is found to be the most preferred option after +2 PCB with MBBS at the top of the list followed by BDS, BHMS, BAMS, BVSc, B.Sc Nursing, B.Sc Agriculture and Forestry. Food Science/Technology and so on. B.Sc in Science is also a preferred option. Biotechnology, Bio-Informatics, Nutrition and Dietetics, Home Science, etc., are also opted by many.

Medicine is found to be the most preferred option after +2 PCB with MBBS at the top of the list followed by BDS, BHMS, BAMS, BVSc, B.Sc Nursing, B.Sc Agriculture and Forestry. Food Science/Technology and so on. B.Sc in Science is also a preferred option. Biotechnology, Bio-Informatics, Nutrition and Dietetics, Home Science, etc., are also opted by many.

In Mumbai:
Mithibai College
Thakur College
National College
Wilson College
Rizvi College
Bhavan's College
Lords College

You should try to do Bachelor in Arts which is more helpful in UPSC and any other government exam because in B.A. you are studying History, Geography so it is beneficial.