Hello dear,
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You have said you have ompleted your graduation.
Now again why are you going for graduation course?
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If you wanted to do designing course,go for diploma.
After your graduation you have diploma in which you  can do designing.
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B.des is for the students who passed of 10+2.
Not for the students who passed out graduation.
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So,it's advisable that even some college is giving Admission don't waste your time choose diploma and start your Career.
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Best of luck