In the stress-strain behavior of a ductile material, what happens after the maximum stress the material can endure?
After the maximum stress (ultimate tensile strength), a ductile material experiences a decrease in stress with additional strain, leading to eventual fracture. As per NCERT, applying relevant law/formula with correct units and sign convention leads to The material begins to fracture. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.