@ ashgar khan
ok.. one more question.. if u can answer.. i did my graduation {with optional math,stat,eco}for some unlucky reasons i have to discontinue my studies,..but from that day to today.. i aim for CSS!!! will it be better for me to go for thorough preparation of CSS or should i first complete my post graduate education[msc eco or maths]will be highly obliged if u can help me in this regard???