Dear Abirami
You may have less chances when compared to north side but as you asked about iiest, it's the best college and with good faculty of more than 40phds, with good number of placements, facilities are also too good. If any case, youll get that college, just go and opt that.
All the best.

Considering you are asking for Jee main paper 2 so the chances should be average to get seat in top colleges but to check where all you can have admission possibilities, you can use below provided college predictor -

JEE MAIN ARCHITECTURE AND PLANNING COLLEGE PREDICTOR

Hope this helps!!!

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