Architecture

Some best colleges for B.Arch is listed below:
*Sushant school of art and architecture
*Manav Rachna International Institute of Research and studies
*Ansal University
*Lingaya's University
*Amity University
*RP inderaprastha Institute of Technology
*O. P Jindal Global University
*KR Mangalam University
*GD Goenka University.

Yes, you can try for seats in Private self-financing colleges like Acharya, Alliance, RV, MSRIT, Oxford, etc.

You can expect a seat in JJ College of Architecture and DYP.

Yes, you can expect a seat on this campus. The score of 171 is very competitive. You can definitely join the same campus.

No, you need to qualify NATA to get admission in this college for architecture.

Yes, they give admission through JEE Mains. With AIR 146, you can easily get into this campus.

Yes, since you are from OBC category, you will get a seat in this campus. This score is enormous for your admission in DYP.

The colleges which you can expect are JJ College, DY Patil, Acharya, Alliance, Dayananda Sagar, CMR, etc.

We can not say approximate score for admission in this college. Admission is through Chandigarh Engineering and Architecture Counselling based on rank obtained in JEE Mains Paper-2. Visit the link below for more information
https://www.shiksha.com/college/Chandigarh-college-of-architecture-3568/admission.

Well, it is not possible to find the state rank directly. But you can compare your AIR with the opening and closing ranks of your HOMESTATE NIT. There, you would get some idea of your position among the previous year's selected candidates of your state. Visit
https://josaa.nic.in/josaaorcrarchieve/Result/OpeningClosingRankArchieveN.aspx?Year=2017
here you should check the ranks of homestate quota of your HOMESTATE NIT. BEST OF LUCK !