Which of the following elements is a metal?

Correct option is D

• Iron(Fe) is the only metal among the options, characterized by its malleability, ductility, and conductivity.
• Iron is a metal with typical metallic properties such as:
• Malleability and Ductility: Can be shaped or drawn into wires.
• Conductivity: Conducts heat and electricity well.
• Luster: Shiny appearance.
• Iron is widely used in construction, manufacturing, and as a core material in alloys like steel.

• Silicon is a metalloid, exhibiting properties of both metals and non-metals.
• It is brittle, not malleable, and primarily used in semiconductors.
  

• Boron is also a metalloid with more non-metallic characteristics.
• It is used in glassmaking and detergents but lacks metallic properties like ductility or conductivity.

• Carbon is a non-metal that forms the basis of organic chemistry.
• It exists in various allotropes, like diamond and graphite, but does not exhibit metallic properties.

• Iron is widely used in construction, manufacturing, and as a core material in alloys like steel.