Hello there,
All the IITs and NITs are best, and also, offer B.Arch, you need to give JEE Main and advanced for getting admission there. Apart from these, here are some good colleges offering architecture :
1. School of Planning and Architecture, Delhi
2. Jamia Millia Islamia University, New Delhi
3. Birla Institute of Technology, Mesra
4. Andhra University, Vishakhapatnam
5. BMS College of Architecture, Bangalore
6. Jadavpur University, Kolkata
7. Amity University, Kolkata
8. Indian Institute of Engineering Science and Technology, Shibpur
9. Sir JJ College of Architecture, Maharashtra
10. Ansal University, Gurgaon

These are some of the best colleges offering Architecture.

Hope this answer helps you.
Good luck!!