A wave travelling in the +ve direction having displacements along y direction as 1m,wavelength $$2 \pi m$$ and frequency of $$\frac{1}{\pi}$$ Hz is reperesented by:

A

$$y=\sin(2\pi x+2 \pi t)$$

B

$$y=\sin(x-2t)$$

C

$$y=\sin(2\pi x-2 \pi t)$$

D

$$y=\sin(10\pi x-20 \pi t)$$