Engineering

JEE (Joint Entrance Exam) is all india entrance test for getting admission in engineering college. It's a two step exam consist of Mains and Advanced, where Advanced is mandatory for getting admission in IITs and IISERs and IISC and some other colleges but with good score in Main exam you can get admission in NITs IIITs and other GFTIs and some private colleges. It's one of the most prestigious and the toughest exam of India. Around 10 lacs students compete with each other to get good rank for the institution for engineering.

NCERT, HC Verma and search popular Mains books and purchase the top searched most purchased books, and finally practice more and more you can. That's enough for Physics not 100 but you can score 90+ easily with it.

If we check combined syllabus of BCA and MCA then it is often equivalent to Bachelor degree of engineering. Study is all about syllabus, if you are going to conquer wide range and meaningful syllabus then it will be definitely helpful in career. Usually done after BCA MCA courses are done by students as they are lengthier and more expensive than the M.Sc. IT courses. Also, MCA graduates have an edge over M.Sc. Graduates as the curriculum of MCA includes management modules also.

M.Tech SPECIALIZATIONS IN MECHANICAL ENGINEERING AND THEIR ORDER OF PREFERENCE
Thermal Engineering. Computer Integrated Manufacturing. Automobile Engineering. Manufacturing Engineering. Material Technology. Industrial Engineering. Product Design and Development. Industrial Safety Engineering.

IGNOU M.Com Eligibility Criteria: The candidates interested in getting admission to the M.Com programme must hold a Bachelor's degree or equal with at least 50 percent marks
there is no entrance exam to get admission to M.Com courses at IGNOU. Admission to M.Com courses at IGNOU is based on merit.

Yes, you can join some colleges in lateral entry in food technology-
IIT Kharagpur, Kharagpur. .
Jadavpur University, Kolkata. .
National Institute of Technology - [NIT], Rourkela. .
Amity University, Noida. .
AMU, Aligarh. .
Kalasalingam University, Krishnankovil. .
Karunya University, Coimbatore

IIT Kharagpur, Kharagpur. Jadavpur University Kolkata. National Institute of Technology - [NIT], Rourkela. Amity University, Noida. AMU, Aligarh. Kalasalingam University, Krishnankovil. Karunya University, Coimbatore
these are best college in the field of lateral entry in food technology.

Yes, you can get good autonomous colleges with this rank.

If possible, make a general EWS Certificate and then apply with EWS quota to have a little chance to get admission in okay type college. According to the cut-off for various categories in the past three years (2019, 2020, 2021), the cut-offs for Joint Entrance Examination Main for GENERAL category is as follows:
2019: 89.7
2020: 90.3765335
2021: 87.8992241
So, according to the trends of previous years, you are not eligible for any college as you do not qualify the JEE Main examination incase of general rank. You can always try the next year with more efforts if you want to.