The correct option is Gold.
Explanation
Ductility is a physical property of metals that describes their ability to be stretched or drawn into thin wires without breaking. It is a measure of a material's ability to sustain significant plastic deformation under tensile stress before failure.
Detailed Analysis
- Gold (Au): Gold is scientifically recognized as the most ductile of all metals. Its ductility is so high that a single gram of gold can be drawn into a wire approximately 2 kilometers in length. It is also the most malleable metal, meaning it can be beaten into extremely thin sheets.
- Silver (Ag): Silver is highly ductile and is the best conductor of electricity, but it ranks second to gold in terms of ductility.
- Aluminium (Al): Aluminium is ductile and malleable, making it suitable for electrical cabling and foils, but it possesses lower ductility compared to gold and silver.
- Lead (Pb): Lead is soft and malleable but has very low tensile strength. Consequently, it is not considered ductile as it cannot be drawn into fine wires without breaking.
Key Takeaway
Gold holds the distinction of being both the most ductile and the most malleable metal found in nature, allowing for extreme deformation without rupture.