The diagrams illustrate the structures of two solids, P and Q. Which row is correct?
- Ahas covalent bonding: P only; conducts electricity: P only
- Bhas covalent bonding: P only; conducts electricity: Q only
- Chas covalent bonding: both P and Q; conducts electricity: P only
- Dhas covalent bonding: both P and Q; conducts electricity: Q only