$ABCD$ is a rectangle where the ratio of the lengths of $AB$ and $BC$ is $3:2$. If $P$ is the midpoint of $AB$,then the value of $\sin(\angle CPB)$ is

  • A
    $\frac{3}{5}$
  • B
    $\frac{2}{5}$
  • C
    $\frac{3}{4}$
  • D
    $\frac{4}{5}$

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