Hello Ruchi

You can reappear for the three subjects again . Maximum five attempts are given to a candidate. One in July - August then again in March , again in July -August and so on. Even after five attempts if one is not succeeded to pass, then student has to appear for all exams along with practicals and all other additional Subjects.

If syllabus is changed , then also you can appear for 3 failed subjects with new syllabus. You don't need to appear for all the subjects.