Let $A$ and $B$ be two non-empty subsets of a set $X$ such that $A$ is not a subset of $B$, then

  • A

    $A$ is always a subset of the complement of $B$

  • B

    $B$ is always a subset of $A$

  • C

    $A$ and $B$ are always disjoint

  • D

    $A$ and the complement of $B$ are always non-disjoint

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