Hey Suveer.

Hope You are doing well!

Well dear,management quota seats refer to seats obtained by donation of money and not on the merit basis.

NIQ means National Reservation Quota,which is the 5% of seats present in almost  all courses in a campus  for all  the students that  belong to states other than Telangana and Andra Pradesh,and have completed their college and schooling from the same.

Hope This was helpful!

All The Best!

Keep Smiling :)