The equation of the stationary wave is
`y = 2 A sin (( 2 pi c t)/( lambda)) cos (( 2 pi x)/( lambda))`
Which of the following statements is wrong?

Options

A. The unit of ct is same as that of `lambda`
B. The unit of x is same as that of `lambda`.
C. The unit of `(2pic)/(lambda)` is same as that of `(2pix)/(lambdat)`
D. The unit of `( c)/(lambda)` is same as that of `(x)/(lambda)`

Answer

D