A long solenoid of diameter 0.1 m has

turns per meter. At the centre of the solenoid a coil of 100 turns and radius 0.01 m is placed with is axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0 A from 4 A in 0.05 s. If the resistance of the coil is

then the total charge flowing through the coil during this time is ____________.
Fill in the blank with the correct answer from the options given below.