For floating bodies, how is the metacentric radius defined?
(a) The distance between centre of gravity and the metacentre.
(b) Second moment of area of plane of flotation about centroidal axis perpendicular to plane of rotation/immersed volume.
(c) The distance between centre of gravity and the centre of buoyancy.
(d) Moment of inertia of the body its axis of rotation/immersed volume.