Hello Ankit 

First of all congratulations on securing a good rank in CEE exam. With this rank you will be definitely get a seat in government colleges under CEE. There is little chances for you to get Assam Engineering college (AEC) as it is counted on top colleges under CEE but you may not get desired branch in AEC, rather than that you can get Jorhat engineering college (JEC) or Jorhat institute of science and technology (JIST) there you will be having more branch option and you can get your preferable branch.

All the best