• I₂ (s) is a non-polar molecular crystalline solid obviously not an electrical conductor i.e. they are non-conductors of electricity because it is formed by weakly dispersion forces; London forces and there is no entity (like ions or ) to conduct electricity.

H₂O (s), which is hydrogen-bonded molecular crystalline solid also do not conduct electricity due to stronger hydrogen-bonding between adjacent water molecules there are no free ions left to conduct electricity.

• On the other hand option (A) Mg (s), which is metal and eventually has electrical conductivity properties because it has free and mobile electron (valence shell) which are cast evenly throughout the crystal.

• And in the case of (B) TiO (s) which behaves like a metal also can conduct electricity because the d-electrons are partially filled and leads to electrical conductivity.