Hey,

These are some of the best colleges of bba in delhi-

Guru Gobind Singh Indraprastha University, Dwarka

Shaheed Sukhdev College of Business Studies, New Delhi

Vivekananda Institute of Professional Studies, New Delhi

NDIM - New Delhi Institute of Management

IITM Janakpuri | Institute of Information Technology & Management

Jamia Hamdard, New Delhi

University School of Management Studies, New Delhi

Bharati Vidyapeeth Institute of Management and Research - [BVIMR]

Bennett University

St. Andrews Institute of Technology and Management - [SAITM]

Hope this helps. 

Good luck!