Excel - Comparison of four columns -


i need compare 4 columns ones in image.

if a+b contents identical c+d, in e want see correct ref number (1st column).

if not identical, want show n/a or similar.

[image link](http://imageshack.com/a/img921/3108/ckwont.png)

what solution suggest?

try array formula:

=match(c1 & d1,$a$1:$a$4 & $b$1:$b$4,0)

it must confirmed ctrl-shift-enter instead of enter exit edit mode.

![enter image description here


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