Three long, straight and parallel wires carrying currents are arranged as shown in the figure. T...

Three long, straight and parallel wires carrying currents are arranged as shown in the figure. The wire \( C \) which carries a current of \( 5.0 \mathrm{~A} \) is so placed that it experiences no force. The distance of wire \( C \) from wire \( D \) is \( x \) centimetre. Then \( x \) is.
(A) \( 9 \mathrm{~cm} \)
(B) \( 7 \mathrm{~cm} \)
(C) \( 5 \mathrm{~cm} \)
(D) \( 3 \mathrm{~cm} \)