Boolean equivalent of shaded area this venn diagram

[reddvoid]

1. what is the boolean equivalent of shaded area

https://www.physicsforums.com/attachment.php?attachmentid=38605&stc=1&d=1315313022"

i tot its abc'+a'b'c
but its not one of the options...

 

[lewando]

Your answer looks right. None of the options look right.

 

[reddvoid]

thank u