Correct option is A
The maximum theoretical value of
Poisson's ratio for a non-dilatant (non-expanding) material is
0.50. Poisson's ratio is the ratio of lateral strain to axial strain in a material subjected to uniaxial stress. A Poisson's ratio of 0.50 indicates that the material is perfectly incompressible, meaning any deformation in one direction is exactly compensated by deformation in the other two directions, with no change in volume. Many rubber-like materials exhibit Poisson's ratios close to this value.
