Which of the following pairs of sets are...

Which of the following pairs of sets are not equal?
(A) `A={1,3,3,1}, B={1,4}`
(B) `A={x: x+2=2}, B={0}`
(C) `A={1,3,4}, B={3,1,4}`
(D) `A={1, 1/2, 1/3,...}, B={1/n : n in N}`
ANSWER : A

A

`A={1,3,3,1}, B={1,4}`

B

`A={x: x+2=2}, B={0}`

C

`A={1,3,4}, B={3,1,4}`

D

`A={1, 1/2, 1/3,...}, B={1/n : n in N}`

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The correct Answer is:

A

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