Correct option is B
The loss of stress with time at constant strain in steel is known as
relaxation. This phenomenon occurs when a material, such as steel, experiences a decrease in stress over time while the strain remains constant.
Ductility: Refers to the ability of a material to undergo significant deformation before rupture.
Creep: Refers to the tendency of a material to slowly deform under a constant load over time, which is somewhat similar but not specifically about stress loss at constant strain.
Shrinkage: Typically refers to the reduction in volume of materials like concrete due to moisture loss.
Therefore, the correct answer is (b) Relaxation.
