The wave described by y = 0.25 sin (10 $\pi X$ – 2$\pi f$), where x and y are in metres and t in seconds, is a wave travelling along the -

Question

( A ) $+$ x direction with frequency 1 Hz and wavelength $\lambda = 0.2 m$
( B ) $+$ ve x direction with frequency $\pi$ Hz and wavelength $\lambda$ = 0.2m
( C ) –ve x direction with amplitude 0.25 m and wavelength $\lambda$ = 0.2 m
( D ) – ve x direction with frequency 1 Hz