Which is the correct statement regarding electron-deficient,electron-precise or electron-rich compounds of hydrogen, along with suitable examples?

Options

1. AElectron-deficient compounds have an excess of electrons, like ammonia (NH 3 ).
2. BElectron-precise compounds have exactly the right number of electrons for stability, like methane (CH 4 ).
3. CElectron-rich compounds lack sufficient electrons for stability, like borane (BH 3 ).
4. DElectron-rich compounds have unpaired electrons, like hydrogen peroxide (H 2 O 2 ).