Variation of x-component of electric field with x-coordinate in a region is given in the graph. A small electric dipole having dipole moment `p_(0)hati` is placed at origin, then net force on the dipole is:
A. `P_(0) tan theta` along positive x-axis
B. Zero
C. `P_(0) tan theta` along negative x-axis
D. `P_(0) tan theta` along positive y-axis
