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If Xuu{1,2}={1,2,3,5,9}, then :...

If `Xuu{1,2}={1,2,3,5,9},` then :

A

The smallest set X is `{3,5,9}`

B

The smallest set X is `{2,3,5,9}`

C

The largest set X is `{1,2,3,5,9}`

D

The largest set X is `{2,3,4,9}`

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