Coulomb friction is

A.Friction between electrically charged bodies
B.Friction between bodies having relative motion
C.Friction between solids and liquids
D.Friction between dry surfaces
E.Friction between lubricated surface

Polar moment of inertia is

A.Same as moment of inertia
B.Applicable to masses whereas moment of inertia is applicable to area only
C.The moment of inertia for an area relative to a line or axis perpendicular to the plane of the area
D.The moment of inertia for an area relative to a line or axis parallel to the centroidal axis
E.The moment of inertia for an area ralative to a line or axis which is out the plane of area