There are good colleges for management studies in Delhi/NCR. Namely,

FMS, New Delhi

MDI Gurgoan

IIFT

DoMS- IIT, Delhi

IMT Ghaziabad

Amity Business School

BIM Tech, Greater Noida

Depending upon the college, you can apply for MBA as well as PGDM course in the above institutes. You will be required to give CAT, MAT, CMAT, IIFT etc to get admission in the above colleges.

I hope you had applied in the above exams as the application has ended for CAT and soon for MAT December it will be starting.

Let me know incase you have query for any other exam or college.

Good Luck!!