Hello Prathap

I'm not going to demoralize you, but to be honest at this marks you won't ne able to get any IIT with core branch, but yes you may go for interdisciplinary courses. You have a chance in NIT's. Go for CCMT councelling.

Nit's like Wrangal, trichy or even Surathkal will be out of reach considering the competetion as the question was bit easy.

For more info: Https://engineering.careers360.com/articles/gate-cutoff-for-nits