Correct Answer - Option 1 : 0.1 π A

__Concept:__

Charging current = VωC

Where,

V = Voltage in volts

ω = 2πf = Angular frequency

f = Supply frequency in Hz

C = Equivalent capacitance

__Calculation:__

Given that, voltage (V) = 500 kV

Frequency (f) = 50 Hz

Capacitance = 2 nF/km

Charging current (I_{c}) = 500 × 10^{3} × 2π × 50 × 2 × 10^{-9}

= 0.1 π A