Commerce

The fee structure at BMS College for Women for Master of Commerce (M.Com.) is around 4620 INR per semester.

Yes, you can pursue master's in arts.

No, JNU does not offer commerce related course.

Yes, you can do data analytics course.

After completing class 12th in any stream from a recognized university or board, you are eligible to apply for Bachelor of Psychology. So yes, Commerce Students are eligible to get admission in Psychology course. But a Commerce graduate cannot enter in field of psychology.

Most colleges offering a Diploma or a B.Sc. In Fashion Designing accept students who have completed 10+2 in any stream with at least 50% aggregate marks from a recognised board of education such as CBSE ICSE etc. You also need to appear in either of the exams for getting a reputed institution of fashion designing -
NIFT Entrance exam by National Institute of Fashion Technology.
NID Entrance Exam by the National Institute of Design. SOFT Entrance exam by School of Fashion Technology.

Top MBA Colleges in Pune are. Symbiosis Institute of Business Management (SIBM) Pune. Symbiosis Centre for Management and Human Resource. Development (SCMHRD) PuneIIM Nagpur. Department of Management Sciences (PUMBA), Pune.

B.Com honours including Maths in (2 year) in the preference of your % criteria these are colleges. Since you have asked for the best colleges let us first have a look at the top ten colleges for commerce in India
SRCC
Lady Sri Ram College for women
Loyola College Chennai
Christ University Bengaluru
St. XavierS College Kolkata
Narsee Monjee College of Commerce and Economics
St. Xaviers college Mumbai
St. Joseph College of Commerce
Hans Raj College
Hindu College.

You can download it from the website of CBSE.