Hello,
You should opt for the stream in which you are interested. Analyse your skills and interests and choose the stream accordingly. Various competitive exams are conducted for recruiting students for Governemnt jobs like SSC CGL, banking exams, etc. and eligibility criteria for most of the exams is candidates should have completed graduation in any stream. So, I would suggest you to opt for the subjects according to your choice and interests.
Let me know, if you are interested in any particular government job and you want to know the eligibility criteria for that particular post.
Good Luck!