Final exam results

. I have not cleared final group 1 for second time now . I havnt studied a.m.a and dt thinking I would pass group 1 and there will be enough time. unfortunately results were bad and now I do not have enough time to prepare both groups. so I was thinking of writing group 1 alone with 2 papers of group 2 by studying them very well and trying to get an exemption. what is recommended .. is it okay if I just sit in exam hall for half an hour for dt and a.m.a. and come out and prepare for an exemption for idt and isca... I feel time is too less for 8subjects ....please please ... please help....