The torque required to hold a small circular coil of 10 turns ,area 1 `mm^(2)` and crying a current of `((21)/(44))`A in the middle of a long solenoid of `10^(3)` turns/m carrying a current of 2.5 A, with its axis perpenducular to the axis of the solenoid is

Options

A. `1.5 xx 10^(+8) N - m`
B. `1.5 xx 10^(+6) N - m`
C. `1.5 xx 10^(-8) N - m`
D. `1.5 xx 10^(-6) N - m`

Answer

C