Two infinite long parallel wires having linear charge densities $\lambda_1\; and\; \lambda_2$ respectively are placed at a distance R. The force per unit length on wire (1) will be:

Question

$(A)\;\frac{K 2 \lambda_1 \lambda_2}{R} \\ (B)\;K \frac{2 \lambda_1^2}{R} \\ (C)\; Zero \\ (D)\;none$