When forces $F_1, \; F_2, \; F_3$ are acting on particle of mass $m$ such that $F_2$ and $F_3$ are mutually perpendicular, then the particle remains stationary . If the force $F_1$ is now removed then the acceleration of the particle is :

Question

( A ) $F_1/m$
( B ) $(F_2 - F_3)/m$
( C ) $F_2/m$
( D ) $F_2F_3/ mF_1$