A simple harmonic progressive wave is represented as y = 0.03 $\mathrm{s}\mathrm{i}\mathrm{n}\pi \left(2t-0.01x\right)m$ . At a given instant of time, the phase difference between two particles 25 m apart is

• A

  $\pi rad$
• B

  $\frac{\pi }{2}rad$
• Correct answer
  C

  $\frac{\pi }{4}rad$
• D

  $\frac{\pi }{8}rad$

Hence, the correct answer is option: 'C'.