Two physical quantities are represented by `P` and `Q`. The dimensions of their product is `[M^(2) L^(-4) T^(-4) I^(-1)]` and dimensions of their ratio is `[I^(-1)]`. Then `P` and `Q` respectively are
A. magnetic flux and Torque acting on a magnet
B. torque and Magnetic flux.
C. magnetic moment and Pole strength
D. magnetic moment and Magnetic permeability