Which of the following is the most ductile metal?

Concept: Ductility is the property of a metal that lets it be drawn out into thin wire under tensile stress without fracturing. It depends on how easily layers of metal atoms can slip past one another while the metallic bond keeps the structure intact — the easier this slip, the more ductile the metal.

Applying it here: Among the metals offered, gold has the atomic arrangement that allows the greatest amount of plastic deformation. A single gram of gold can be drawn into a wire about two kilometres long, which is why it ranks first in ductility.

Comparing the candidates by their drawability:

Result: Gold is the most ductile metal among the options.