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If $R \subset A \times B$ and $S \subset B \times C$ be two relations, then ${(SoR)}^{- 1} =$

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S-1oR-1

R-1oS-1

SoR

RoS

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Correct option is B

It is obvious.

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If R⊂A×B and S⊂B×C be two relations, then (SoR)-1=

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If $R \subset A \times B$ and $S \subset B \times C$ be two relations, then ${(SoR)}^{- 1} =$