Which is a better college for PGDM among RIIM, United World-Kolkata and ABS in terms of placement?

I will give the review about (through my personal experience) ABS as I am in the 3rd semester and my specialisation is HR. I have got so many opportunities for my placement and few of my friends got placed in good firms with a high package. So, I will suggest that you join ABS.

All of these colleges are nearly same in the placement process. It's your efforts, which will decide your placement.