Hii Janvi
No certainly not . A Bachelors in management studies degree from te shaheed sukhdev college of business studies , Delhi carries a lot of weight and can enhance your career but it is certainly not worth dropping 2/3 years for appearing for the DU-jat because even after getting into sscbs it might be very difficult for you to get placed in a good company with a good pay also. I would suggest you to continue your BBA in the college you are in and prepare for CAT in full swing as an MBA from an ivy league business school or from an IIM will make you career .
Hope it helps
Thanks
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