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If A, B and C are three sets such that `AnnB""=""AnnC` and `AuuB""=""AuuC` , then (1) `A""=""B` (2) `A""=""C` (3) `B""=""C` (4) `AnnB""=varphi`

A

`A=C`

B

`B=C`

C

`AnnB=phi`

D

`A=B`

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B
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