which sets are equal ? 1.{r,s,t} 2.{s,s,t,r} 3.{t,r,t,s}

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Q. which sets are equal ? 1.{r,s,t} 2.{s,s,t,r} 3.{t,r,t,s}

(A) 1 and 2
(B) 2 and 3
(C) 1 and 3
(D) all are equal

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✅ Correct Answer: (D) all are equal

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