Let X={1,2,3,4,5}. The number of differe...

Let X={1,2,3,4,5}. The number of different ordered pairs (Y,Z) that can be formed such that `Y ulsub X, Z ulsub X` and `Y nn Z` is empty , is :

A

`5^2`

B

`3^5`

C

`2^5`

D

`5^3`

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The correct Answer is:

B

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