Hello Ramakant,
Yes, certainly you can do an MBA in any niche after your B.Voc. The Eligibility criteria for pursuing an MBA is Graduate Degree. And BVoc is a proper Graduation Degree. So further if you are planning to do MBA you can do go for it.
However, you should be at least in your final year and have a valid CAT score clearing all the cutoffs. To know about the admission process of IIMs, you can visit the following link:
https://bschool.careers360.com/articles/iim-admission-criteria
Hope this information proves to be helpful and all the best.
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