What's good: MBA in finance or HR or dual specialisation?

Both are equally good. It is only a matter of choice. MBA finance and HR are both in equal demand. Choose what you think is more interesting. If you are thinking about doing the course from a particular college then talk to the seniors in the respective streams about placements. That will give you s

Take dual specialization. It will increase your opportunity to get placed in big companies.

This dual trend started in early 2000 and is now no more a corporate favorite. This is the age of specialization, don't dilute your core competencies, go for the subject you are more passionate about, placements follow those who excel. I would suggest you visit this portal and listen to their channe