Which of the following items is good conductor of electricity

Ok here's something i know. Metals are good conductors of electricity because the electrons are free to move in a network of metal atom. So because of the "Sea of Electrons", these electrons do not belong to just one atom but move freely about the metal's network which makes them great conductors of heat and electricity. Also, because they contain many orbitals separated by extremely small energy differences, and metals can absorb a wide range of light frequencies too.

There are no good conductors on the list you provided.