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If A = {1,3,5,9} and B={ 1,2,3,4,7,8} ,...

If A = {1,3,5,9} and B={ 1,2,3,4,7,8} , then `A cup B ` is

A

`{2,3,5,9,7,8}`

B

`{1,2,3,4,7,8,9,}`

C

`{2,3,5,9,1,4,7,8,}`

D

`{2,3}`

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