Two long parallel wires kept 2 m apart carry 3A current each, in the same direction. The force per unit length on one wire due to the other is
(A) 4.5 x 10⁻⁷ N/m, repulsive
(B) 9x 10⁵ N/m, attractive
(C) 4.5 x 10⁻⁵ Nm-¹, attractive
(D) 9 x 10⁻⁷ N/m, repulsive​