same here I got same letter on july30 I applied in november23 2010.in 2010 my income was good.but in 2009 my income was low.i m also worried same.......
i apply my parents in 23 November 2010 I applied for 4 peson in india we was 2 here so in 2010 my income was 53500.but in 2009 my income was only 19900.now they require 2009 option c is there any problem in my file plz tell me