I am not expecting good marks to get admission in iit or nit. so please suggest me the best btech colleges of high packages and placements.

I am fresher of 12 and had given the jeemain but expecting to score very less marks somethig around 46mks(general).but i expect to get good marks in 12 board percentage.i request you to help me to guide me about the well known placements and good packages btech engineering colleges.