Hey that's a great score in Nata especially with 91% in boards. Congratulations to you first of all for your efforts. 

There are greater chances for you to get admission into CEPT and Even JJ College. 

I can give you a suggestion if not this college, then... 

You have to apply for each state for the admission in to B.Arch. They will give a state rank with your NATA score and 12th marks.. You should be able to get in to most of the good colleges in all the states except 3–4 colleges.

You can get good colleges in Karnataka, Telangana, Maharashtra and Andhra Pradesh.

Best wishes..