Which course is better for MBA (finance, marketing or HR)? I am very confused.

It all depends on your interest. By "better" if you mean package offered in placements, then it's not the right way to plan for a career. Instead try to figure out your interest area, research more about each of them and see if they are relevant to your current field. Hope that helps.

If you are looking for additional certification related to finance- Advanced tally, SAP has scope. If you are looking for marketing - Digital marketing and Salesforce is good. In case of HR- Talent acquisition and Leadership development has a good scope along with SAP.