Your perusal for graduation course must reflect your passion and inclination for the chosen course in order to show better performance. Here are a few options which you may consider prior to your final selection of the course.
1) If interested to crack IAS examination organised by UPSC, graduation from any stream is acceptable provided you labour hard simultaneously to achieve a result in the desired direction. You may join a reputed institute for the effective guidance.
2) To appear in the in the provincial civil service, you need to have a graduation - degree in any of the streams - Arts, Science and Commerce background. With a little involvement, you can excel well for the said examination.
3) If you have an inclination for Engineering course for any stream such as Mechanical, Electrical, Chemical, Electronics, Computer - engineering etc, you must enrol in Bansal classes, FIIITJEE etc so that you may qualify In IIT with the assistance of one of these professional institutes. Even to have a seat in the regional Engineering colleges would not be bad provided you are interested in the same.
4) Continue B.Sc with Physics, Chemistry and Mathematics and ultimately prepare for MCA so that you grab a seat in a reputed college to have a brighter career in the computer line.
5) Management course from IIM can be procured with an excellent percentile in the CAT examination. You may take up either Finance or IT for the brighter prospects.
So, there are various options to choose, the only thing is that you must have a real passion for the course, you choose.