Hello Arundhathi,

Sir JJ College offers BArch course according to the candidates merit score which can be calculated by NATA score and 12th percentage 

To get admission in this college you must have merit score above 150

Your merit score become to be

Merit score = ( NATA score)/2 + 12th %

= 60 + 90 = 150

NATA Score - 120 

You should atleast score 120 marks in NATA exam to get admission in Sir JJ College of Architecture

Hope this helps

Good luck