Which of the following is a metal?

Iron

The correct answer is option 3. Iron.

The metal among the options provided is Iron

Iron is a metallic element and is commonly classified as a metal. It is known for its characteristic properties of being malleable, ductile, and having high tensile strength. Additionally, iron exhibits metallic luster and is a good conductor of electricity and heat. Therefore, option 3, Iron, is the correct answer.