A long solenoid of diameter `0.1 m` has `2xx 10^(4)` turns per metre. At the centre of the solenoid, a coil of 100 turns and radius `0.01 m` is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to `0 A` from `4A` in `0.05` .If the resistance of the coil is `10 pi^(2) ohm`, the total charge (in `mu C` ) flowing through the coil during this time is

Options

A. `32pimuC`
B. `16muC`
C. `32muC`
D. `16pimuC`

Answer

C