Hey Rajeshwari,

If you are planning for MBA in future then the best course for graduation will be BBA only. I am suggesting you this because I too have graduated with BA and now I am doing MBA and believe me I had to face many problems just because I have done BA. 

By the way among these three courses BA economics will be the best to persue. It will give you benefit in MBA as you will be much familiar with the atmosphere and syllabus of MBA.

I have done BA in political science and Sociology that's why I faced problems but if you will go for BA in economics that will be much helpful for you.

Good luck.