Two semi-infinite conducting sheets are placed at right angles to each other as shown in the figure. A point charge of +Q is placed at a distance of d from both sheets. The net force on the charge is \(\frac{{{Q^2}}}{{4\pi {\varepsilon _0}}}\frac{K}{{{d^2}}}\), where K is given by

• A. 0
• B. \( - \frac{1}{4}\hat i - \frac{1}{4}\hat j\)
• C. \( - \frac{1}{8}\hat i - \frac{1}{8}\hat j\)
• D. \(\frac{{1 - 2\sqrt 2 }}{{8\sqrt 2 }}\hat i + \frac{{1 - 2\sqrt 2 }}{{8\sqrt 2 }}\hat j\)