Hii Ranjan Kumar Soni,

Following are Some Colleges you can get with 400 if you're SC/ST

1.IIT, Allahabad(Electronics and Communication Engineering)-SC

2.NIT, Goa(Computer Science and Engineering)-ST

3.NIT, Surathkal(Chemical Engineering)-SC/ST

4.NIT, Meghalaya(Computer Science and Engineering)-SC/ST

5.NIT, Agartala(Computer Science and Engineering and Chemical Engineering)-SC/ST

Please let me if you're not SC/ST Candidate and Don't forget to Include your Stream of Interest, Hope it helps!