$\left| \begin{array}{ccc} 0 & p-q & p-r \\ q-p & 0 & q-r \\ r-p & r-q & 0 \end{array} \right| = $

  • A
    $0$
  • B
    $(p-q)(q-r)(r-p)$
  • C
    $pqr$
  • D
    $3pqr$

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