Compare 2 columns of 2 different sheets & get duplicate

[sanjuss2]

Hi,
I have Sheet1 & sheet2
where I have to find value of Column C & D of Sheet1 which has to match with Column F & G of Sheet 2
I want result as duplicate in column E of Sheet1.
I need a formula only...
Thanks in advance

[sanjuss2]

I have used following formula & drag down

=IF(ISERROR(MATCH(C2&D2,Sheet2!$F$2:$F$258&Data!$G$2:$G$258,0)),"","Duplicate")

Press Ctrl+Shift+Enter

It works fine
thanks to everyone