Hii Smriti,
For admissions to different courses at Christ University you will have to fill a different application form and appear for a different entrance test which will have a different pattern when compared to the other. On the same admissions portal you can apply to both B.B.A and B.com (//B.com) as well but you'll have to fill different forms online and pay separately as well.
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Hope it helps,
Thanks,
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