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Let f:XtoY and A,B are non-void subsets ...

Let `f:XtoY` and A,B are non-void subsets of Y, then

A

`f^(-1)(A)-f^(-1)(B)supsetf^(-1)(A-B)` but the opposite does not hold

B

`f^(-1)(A)-f^(-1)(B)subsetf^(-1)(A-B)` but the opposite does not hold

C

`f^(-1)(A-B)=f^(-1)(A)-f^(-1)(B)`

D

`f^(-1)(A-B)=f^(-1)(A)cupf^(-1)(B)`

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The correct Answer is:
C
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