Maths, Computer, Geography, Economics, English... All these courses are equally helpful for good opportunities. However, you can choose any discipline which is most interesting to you. Maths, Computer and Geography will give you opportunities in technical fields unlike other courses. So it is all about your interest to choose from these. Best institutes to pursue these courses are Delhi University, Lovely Professional University, Loyola college, SRM university etc. Some of the institutes are offering scholarships also to the meritorious students.