Sales & Marketing

There is no specific course for marketing in the gaming industry. Even if you find one such course, I will advise you not to do very narrow specialization course. You should never curtail your career in a niche industry unless you are convinced that you only want to have lifetime career in the gaming industry. You may do BBA or MBA with marketing and look for a job in a gaming company.

Both HR and marketing are good in XIME.
For GD you can study about current topics.
PI will be based on you education and work experience.

Generally, you can opt for B-schools. But, sometimes, you may choose general colleges.

You can expect anywhere starting from Rs 8 lakhs per annum upto Rs 16 lakhs per annum.Although you can even go below incase you're amongst last students getting placed, solely depends upon your resume.

You can learn about trading and equity research from NSE which offers various courses in trading and shares, capital markets, forex management and derivative, etc.

Marketing stream has average placements while HR has very good placements.A average salary is Rs 5 lakhs per annum.
https://www.shiksha.com/getListingDetail/32029/institute/college-Xavier-Institute-Of-Social-Service-Xiss-Ranchi-India

Without being graduate you cannot be post graduate, so you definitely need Graduation with minimum 50% marks and valid entrance exams score like CAT, CMAT, MAT, GMAT.

MBA or PGDM from top 30 B-schools is recommended in marketing specialization, which will give you opportunities in management roles and leadership strategic roles in future.

MBA in marketing from top B-schools will fetch you great opportunities into international business, Import export management, tourism marketing, brand management and account planning.