Shashwat, your question doesn't include the degree or course for which you are interested in. However, here is a list of few top colleges in commerce stream where you can get admission after 12th:--

SRI RAM COLLEGE OF COMMERCE, UNIVERSITY OF DELHI

LADY SRI RAM COLLEGE FOR WOMEN, UNIVERSITY OF DELHI

CHRIST UNIVERSITY, BANGALORE

HANSRAJ COLLEGE, DU

LOYOLA COLLEGE, CHENNAI

St. XAVIER'S COLLEGE, MUMBAI

HINDU COLLEGE, DU

KIRORI MAL COLLEGE, DU

MADRAS CHRISTIAN COLLEGE

NARSEE MONJEE COLLEGE OF COMMERCE AND ECONOMICS, MUMBAI