B.A

No cutoff as such.u need to have 50% and above.

I don't think that it is a routine. It involves procedure and study visa. Our University should have a recognised status.The process may generally be the same as in the USA.

Opt for what you wish to do in the future. Speak to students who are studying both. Make a note of the pros and cons of both. Know the scope they have and then make a call.

You have not mentioned the duration of diploma course. But, a degree course in distance mode with a certification course/diploma undertaken simultaneously is valid.

Dear Pooja,
For that, you need to contact to Regional centre of IGNOU . They will guide you better for this regard.
All the best.

Hi, MBA in HR management or MBA in HRM aims to provide you with a thorough grounding in Business HR Management via integrating the main functional areas through the application of strategic HR management. For more details, kindly refer the link below: https://ask.shiksha.com/what-are-the-eligibility-for-mba-hr-specialization-qna-1888986
I hope it helps. Kindly feel free to revert.
Wish you luck.

No doubt, both the ideas are good. But, what are the additions to the core of your study?
Is there any additional effort? Think about the added qualification also.

You are graduate. If your graduation score is 50% or more then you are eligible to to give exams such as CAT, SNAP, NMAT, XAT, etc. Your admission will be dependent on your score of these exams. Placement will be dependent on your overall performance in MBA b-school.