The direction ratio of the line $3x+1=6y-2,\:z=1$ is ?

Question

$\begin{array}{1 1} (a)\:\:(2,1,1)\:\:\qquad\:(b)\:\:(1,1,1)\:\:\qquad\:(c)\:\:(3,6,1)\:\:\qquad\:(d)\:\:(2,1,0) \end{array}$