In todays scenario, it is impossible to say that jobs can be obtained only through a particular subject. Studying a Course will provide only a degree. While doing this degree, you should also develop various other skills.
It is highly important to acquire a qualification that will suit 2 to 3 different jobs and develop skills like analytical skills, General Knowledge, Mathematical Skills and precision working skills through proper training. Start writing competitive exam.
Try to acquire more skills of your interest along with skills like Typing, Computer and English Communication.>