In the figure two positive charges $q_2$ and $q_3$ fixed along the y-axis , exert a net electric force in the $+x$ direction on a change $q_1$ fixed along the x-axis . If a positive charge Q is added at $(x,0)$, then the force on $q_1$

Question

$\begin{array}{1 1} \text{shall increase along the positive x -axis} \\ \text{shall decrease along the positive x -axis} \\ \text{shall point along the negative x -axis} \\ \text{shall increase but the direction changes because of the intersection of Q with $q_2$ and $q_3$} \end{array}$