Let $\Delta, \nabla \in \{\wedge, \vee\}$ be such that $( p \rightarrow q ) \Delta ( p \nabla q )$ is a tautology. Then

  • A
    $\Delta=\wedge, \nabla=\vee$
  • B
    $\Delta=\vee, \nabla=\wedge$
  • C
    $\Delta=\vee, \nabla=\vee$
  • D
    $\Delta=\wedge, \nabla=\wedge$

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