Answer:
Mr Micheal is correct
Step-by-step explanation:
From what Mr Tony said, he said if we breakdown 1 water molecule i.e (2 hydrogens and 1 oxygen)
, we'll get (2 hydrogens) and Oxygen gas (2 oxygens).
NO, this claim is wrong,
Dissociation of 1 water molecule results in 1 hydrogen gas and hydroxide and not (2 hydrogens) and Oxygen gas (2 oxygens).
i,e

Mr Micheal says that is inefficient because you would need to breakdown 2 molecules of water to make only 1 oxygen molecule.
Yes, two molecules of water will result in 2 molecules of hydrogen and 1 molecule of oxygen.

Therefore, I agree with Mr Micheal because he is right.