Shear strain of the diamond is

Explanation

Diamond is known for its exceptional hardness and rigidity, due to its strong covalent bonding and highly ordered atomic structure. When subjected to shear stress, diamond resists deformation up to an extreme level, meaning it requires a very high shear stress to deform plastically. Thus, the concept of 'infinite' shear strain is used to indicate that practically, diamond does not undergo significant shear deformation.The incorrect options are:Less than one: This would imply that diamond can easily undergo shear deformation, which it cannot.Greater than one: This would suggest diamond deforms extensively under shear stress, which is contrary to its properties.Zero: This would mean diamond shows no deformation at all, which is not accurate, as it does experience some degree of elastic deformation before reaching the point of very high stress.