When a wave travels in a medium,the particle displacement is given by $y = a \sin(2 \pi (bt - cx))$,where $a, b$ and $c$ are constants. The maximum particle velocity will be twice the wave velocity if

  • A
    $c = \frac{1}{\pi a}$
  • B
    $c = \pi a$
  • C
    $b = ac$
  • D
    $b = \frac{1}{ac}$

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