A charged particle \( q \) is placed at the center \( O \) of cube of length \( L(A B C D E F G H) \). Another same charge \( q \) is placed at a distance \( L \) from 0 . Then, the electric flux through \( A B C D \) is
(A) \( q / 4 \pi \varepsilon_{0} L \)
(B) zero
(C) \( q / 2 \pi \varepsilon_{0} L \)
(D) \( q / 3 \pi \varepsilon_{0} L \)
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