MBA/PGDM

Pursue a regular MBA in Operations or Marketing. That will be much better than MBA in Oil and Gas.

Marketing or Operations will be the best option for you. They have a scope.

Graduation degree is needed for MBA. A Diploma certificate is not deemed valid.

No, you need a Bachelor's degree for MBA.

IIM-K offers PGDM course which is their flagship 2 years full-time MBA program. IIM-K doesn't offer any degree with IT as a major. However, once you join, in the second year of the course there are a lot of electives which you can take related to IT and make your profile inclined towards this domain.

Hi, Please find the links below for the detailed information on the courses:
https://www.shiksha.com/careers/business-analysts-179
https://www.shiksha.com/careers/accountant-211.

Hi Sandip,
Please find the links below:
https://www.shiksha.com/mba/resources/mba-alumni-data
https://www.shiksha.com/mba/articles/mba-a-good-career-choice-undoubtedly-blogId-6843

Hi, Karnataka Post Graduate Common Entrance Test 2018 result has been declared on July 15, 2018. http://karresults.nic.in/indexcet2018.asp.

Hi,
Please find the links below:
https://www.uihmt.com/hotel-management-course-in-dehradun/master-of-hospital-management
https://www.uihmt.com/about-us

See, it actually depends on your interest. The background doesn't matter much. It only helps you to understand a few basic subjects that you studied in your UG. You can fit into any specialisation. Try reading the basics of every specialisation and see which one suits you the best. But if you ask me, you might find HR comfortable. Good luck.