\textbf{178.} In the figure below, the net electric field at point A is zero. $\left|\dfrac{q_2}{q_1}\right|$ is equal to?
\textit{[Figure: Three charges $q_2$, $q_3$, and $q_1$ arranged at corners of a square, with point A at the bottom-left corner.]}
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(1) $2$\\
(2) $2\sqrt{2}$\\
(3) $4$\\
(4) $4\sqrt{2}$
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