Correct Answer - Option 4 : All of above
Method of reducing line reactance in the transmission line is is
Parallel transmission lines: It is reducing line reactance in the transmission line
Using series capacitance: In series compensation, reactive power is inserted in series with the transmission line for improving the impedance of the system
Using bundled conductors: Bundle conductors are used for transmission purpose as it helps in obtaining better voltage regulation and efficiency by reducing the inductance and skin effect present in the power lines
