What is the difference in terms of placement in PGDM and MMS? What are my chances to convert, if am from Jharkhand general category.

There is no difference in terms of placement in PGDM and MMS. In fact, PGDM and MMS students sit together for final placements and internships. Valid score in any of the all India approved tests are accepted. (CAT,CMAT, XAT, ATMA, MAT,MH CET). here is no prescribed minimum cut off score for any test