change from old syllabus to new

yes , u can do this. u hav to just select new course in exam form.

what if there is exemption in 1 subject of old course....

will the exemption continue for that subject in new course...?

yes, exemption vil continue.

but please advice should we switch over.i also have group 2 pending.what new things we will have to learn

It is better to switch to new course because in that case we are creating back up plan for us, i am very sure the results of old course will be low