For particles $\mathrm{A}$ and $\mathrm{B}$ executing S.H.M., the equation for displacement is given by $\mathrm{y}_{1}=0.1 \sin (100 \mathrm{t}+\mathrm{p} / 3)$ and
$\mathrm{y}_{2}=0.1$ cos pt respectively. The phase difference between velocity of particle $\mathrm{A}$ with respect to that of $\mathrm{B}$ is $\ldots \ldots$
$(\mathrm{A})-(\pi / 3)$
(B) $(\pi / 6)$
(C) $-(\pi / 6)$
(D) $(\pi / 3)$