Hello!Lokesh

With 45 marks your score will be around 450 but to get IIT you require above 600 score ,for such score you need marks at least 60 marks.This year cuttoff may go up as paper was easy in comparison with previous year.So cuttoff score will go high little bit.You may get NITs with this score for pursuing master degree courses in civil engineering.

You can ask if you have any other queries.