Sales & Marketing

Both HR & Marketing are important in business and both require different skill-sets. In my opinion, MBA in marketing would have better scope because:-
1. Marketing is closer to the revenue of a business. Generally, companies consider marketing as Profit-center and HR as Cost-center. If you do well in marketing, your contribution would be easily recognised by top management.
2. I think marketing would have more jobs. As soon as a startup is founded, marketing executives are needed. However, HR execs hiring could be postponed or outsourced till company becomes bit stable. In the same company, size of marketing team would be bigger than size of HR team.
3. Many B-schools don't offer HR discipline, but almost everyone offers Marketing. So, you may get less options to study HR. It could also be seen as a signal about demands of jobs. However, HR has some advantages as well. If everyone starts thinking like the above points, you would get less competition in HR. So, with lesser efforts, you can easily grow in HR career ladder also. By the way, most of the top managers need to learn HR skills over the time, because they need to hire, fire, retain & mentor employees & team. If you are passionate about HR's roles & responsibilities, then there is no harm in learning it.

This would depend on your interest areas and career aspirations. Since you are a B.Com you would not be able to take admission in MCA as you would be required to have a BCA first. However, based on your interest you can join private institutes who offer such courses affiliated to international institutes/boards to pursue a career in Technical / research / academics area, However if you want to move into general management the MBA is better. Even for a full time MBA you would need minimum 50% marks at Graduation level, so you would not be eligible for it. Since you have work experience of 3 years you can explore executive MBA or Part time MBA or Distance MBA programme.