actully sir, i am apearing for jee-17 and if i score 120 in sc category then which of the colleges of the best i supposed to get

@ shubham 
which exam u are talking about – jee mains or advanced ?? 
if its jee mains , then u will get good colleges like iiit as catagory are attched to your name , still ryt now we cannot say anything as the difficulty of paper we dnt know , so, it will be impossible to make a guess on average cutoff . 
ALL THE BEST ..