Hey Charitha,

First of all congratulations on your marks.Based upon your marks you are leigible for some of the best colleges in Bangalore for B.Arch the first list cutoffs are always high and may touch 95 percentile.Since you habe BC-b you hold chances to qualify for the admission cutoff in the first or the second round cutoffs for reserved category candidates.I will provide you with the best collegs in Bangalore for B.Arch:

• Sir MV School of Architecture
• School fo Architecture,CMR University
• Ramaiah Institute of Technology 
• Reva University
• BMS College of Engineering
• PES University Bangalore
• R.V College of Engineering
• The Oxford Colleg of Engineering

Access this link to predict your colleges and for further more https://engineering.careers360.com/jee-main-architecture-college-predictor.

Regards!