A n sridhar v/s suggested papers

Hi..

i have taken AN Sridhar for SFM... it quite good book....clearing all concepts..bt whn i matched ans of Sridhar May 2011 exam with suggested.. all were different except one or two.. Sridthar says sumthin else and suggested says sumthin else..

So i m really confused whr to go.. So plz put lights on above said facts..and show the right way..