. Poor conductors of electricity is/are
C: Pure water
Insulators are materials that are poor conductors of electricity. Reason is that the charges cannot travel through these substances, hence they do not conduct electricity.
Whereas, in the case of Conductors, these are the materials in which free electrons are present and these electrons are responsible for conduction of electricity.
Aluminium, pure water and copper have free electrons so they can easily conduct electricity.
Hence, the correct option is (A) i.e silver