Force Between Parallel Current Wire | MCQ

Two long parallel wires kept 2 m apart carry 3 A 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 Nm^-1 , attractive

(B) 4.5 x 10^-7 Nm^-1 , repulsive

(C) 9 x 10^-7 Nm^-1 , repulsive

(D) 9 x 10^-7 Nm^-1 , attractive