The correct statement is:
Metals can be hammered into thin sheets, and nonmetals are brittle.
Metals are malleable and ductile, which means they can be shaped without breaking, while most nonmetals tend to be brittle and can shatter when subjected to pressure.
The other statements contain inaccuracies. For instance, most nonmetals are gases or solids (like sulfur and phosphorus) at room temperature, not liquids. Additionally, metals are generally good conductors of electricity while nonmetals are typically poor conductors. Finally, metals and nonmetals are found in different sections of the periodic table, not in any column interchangeably.