Hey Subhash,

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 %

= 92 + 75 = 167

So there are high chances for your niece to get admission in Sir JJ College of Architecture

Good luck