Law

There is no subject / specialization wherein Job guarantee is there. However there are ample jobs for people who are flexible, willing to learn & have the positive attitude. If a person has clarity on what he wants to do in life then he can comfortable locate a job for himself, yes the remuneration my not be matching his/her expectations but then remunerations is a function of time, experience & skills acquired so have patience and all will fall into place.
Having said that a BA graduate in history/ philosophy / political science can assist you in preparing for UPSC exams. A BA in languages can given an edge in pursing a career as a teacher / journalist/ writer/media
A B.Com in accounts can give you an opportunity to pursue a career as an accountant and also explore CA as a professional course option
BSc in any subject will give you an opportunity to pursue a masters degree and then pursue a career n research /teaching/academics.
After graduation one can pursue post graduation in the said subject and then pursue a specialized career in the area.
Also after a generic BA/ B.Com/ B.Sc one has ample opportunities in sales, operations, customer service, education, manufacturing , media, that a person can pickup and build a career.
In case you have any specific query regarding a subject then do let me know and i will try and answer it