A transverse wave is described by the equation $\mathrm{y} = {\mathrm{y}}_{\mathrm{o}} \sin 2\mathrm{\pi }\left(\mathrm{ft} - \frac{\mathrm{x}}{\mathrm{\lambda }}\right)$ .The maximum particle velocity is equal to four times the wave velocity if : 

• A

  $\mathrm{\lambda } = \frac{{\mathrm{\pi y}}_{\mathrm{o}}}{4}$

• B

  $\mathrm{\lambda } = \frac{{\mathrm{\pi y}}_{\mathrm{o}}}{2}$

• C

  $\mathrm{\lambda } = {\mathrm{\pi y}}_{\mathrm{o}}$

• D

  $\mathrm{\lambda } = 2{\mathrm{\pi y}}_{\mathrm{o}}$