True. For example, electron domain geometry and molecular geometry of water and ammonia are different.
A substance either an ion or a molecule that can act either an acid or a base depending on a medium is called Amphoteric. Some metals like zinc, tin, copper and aluminium which produce either metal oxides or hydroxides are examples of amphoteric. During the Amphoterism, the metal compound acts either an acid or a base depending on their oxidation state.
I believe that the answer is A i could be wrong though.
It's a trick question because all of them contain both iconic and covalent bonds.
Hope it helps!! :) have fun
