If $p, q, r$ are simple propositions,then $(p \wedge q) \wedge (q \wedge r)$ is true,then:

  • A
    $p, q, r$ are all false
  • B
    $p, q, r$ are all true
  • C
    $p, q$ are true and $r$ is false
  • D
    $p$ is true and $q$ and $r$ are false

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