Final registration

i have doubts regarding final registration:

a) whether i have to take dd seperately for 10000(final) and 2000 ( for article) or wholly for 12000.

b) in form 103 and final reg form they've asked about dd details. if i take dd for 12k, shall i enter the same dd no. wit relevant amts in both forms?

c) i am downloading reg form from website for final. whether i have to pay rs 100 for application along with 12k. someone told this. is ttrue.

pls clear my doubts. thanks in advance