Hello,

First of all congratulations for your son's great success and to you also, according to me when it comes to choose between NIT,BITS,IIIT my suggestion will always be to keep NIT at first priority IIIT at second priority and BITS at third.

Government institutions always hold a superior class when it comes to comparison with private institutions, NITs,IIITs holds a great amount of experience and have the best Faculty and best teaching environment.

With 99.4% in jee your son can get a very good NIT so all the beat for the Counselling.

Hope this helps,

All the best !