Two simple harmonic motions are represented by the equation $$y_1 = 0.1 \sin\left(100\pi t + \frac{\pi}{3}\right)$$ and $$y_2 = 0.1 \cos \pi t$$. The phase difference of the velocity of particle 1 w.r.t. the velocity of the particle 2 is

A

$$-\pi/6$$

B

$$\pi/3$$

C

$$-\pi/3$$

D

$$\pi/6$$