It is Entirely upon your Interest. Just think of Future plans you have made and as per that select the Subject. Just for example, you want to do MA in Economics so you must go for Economics, as simple as that.
According to me all the 3 are good but if you have not made any plans then i would suggest you to go for Economics.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile