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

1. A
   $-ve$ $x$ direction with amplitude $0.25\text{m}$ and wavelength $\lambda =0.2\text{m}$
2. B
   $-ve$ $x$ direction with frequency $1\text{Hz}$
3. C
   $+ve$ $x$ direction with frequency $\pi \text{Hz}$ and wavelength $\lambda =0.2\text{m}$
4. D
   $+ve$ $x$ direction with frequency $1\text{Hz}$ and wavelength $\lambda =0.2\text{m}$