A three-phase transmission line has a horizontal configuration with a spacing of 6 meters between adjacent conductors and 12 meters between outer conductors. The radius of each conductor is 1.81 centimeters. The value of inductive reactance for 1 kilometer is:
a. 1.579 Ohms
b. 0.789 Ohms
c. 2.579 Ohms
d. 3.579 Ohms