Two coaxial solenoids of different radius carry current I in the same direction. `vec(F_1)` be the magnetic force on the inner solenoid due to the outer one and `vec(F_2)` be the magnetic force on the outer solenide due to the inner one. Then
A. `vecF_(1)` is radially inwards and `vecF_(2)` is radially outwards
B. `vecF_(1)` is radially inwards and `vecF_(2) = 0`
C. `vecF_(1)` I radially outwards and `vecF_(2) = 0`
D. `vecF_(1) = vecF_(2) = 0`
