Is this a business school as the PG in MBA should be selected on the basis of business school?

Please note that the universities and university-affiliated colleges offer MBA programs, whereas standalone institutes and autonomous institutes can offer PGDM programs as per UGC guidelines. The degrees in IIMs are called Diplomas only for this reason. Your choice should be based on quality of inst

Yes, PG should be elected on the basis of business school. It is a B-School.