West Bengal

Lateral entry in diploma is only possible in second year, not in the third year and is completely dependent on college and university norms, some university allow it and some won't plus you need to have good scores in first year to apply for the same. For further details contact the college authorities.
Details: https://www.shiksha.com/engineering/course/diploma-in-mechanical-engineering-lateral-entry-chandigarh-college-of-engineering-and-technology-289459

I guess, this might help you:
http://su.onlineadmission.org/ghc/coursesoffer.aspx?clgcode=APCC

Hi,
The timings are from 10:00 AM to 2:00 PM (time slots have already been allotted). Please refer to the merit list.

Visit Shiksha's link given below to get the complete details.
Total 45 colleges are offering MCA in West Bengal:
https://www.shiksha.com/it-software/colleges/mca-colleges-west-Bengal

Admission process:
Interested candidates can apply online with required information.
Merit screening:
Admission is based on the marks obtained in graduation.
https://www.google.com/amp/s/www.shiksha.com/science/course/amp/m-sc-in-chemistry-bankura-university-west-bengal-other-290009

You could apply for MA Economics or M.Sc Economics/statistics.
Or, you may also go for MBA.
Apart from this, you can pursue CFA.
Jobs scope could range from bank jobs to data analytics to Policy making.

These are some of the colleges for mathematics honours:
*Maulana Azad College
*Vidyasagar College
*Sammilani Mahavidyalaya
*Purash Kanpur Haridas Nandi Mahavidyalaya
*Charu Chandra College
*Mahadevananda Mahavidyalaya.