OAA anyone kindly tell me what to study wise for the assessment ?
Congratulations!
Have a look at the BAA FPP thread and the more general OAA one. There's loads of advice on there. Also have a look on the OAA official forums - one of the guys working for OAA have written quite a good guide on what to expect on the day. I found the thread on the OAA page most informative.