Final answer:
The incorrect Lewis structure shows hydrogen incorrectly forming more than one bond, which is not possible as hydrogen can only form one bond.
Step-by-step explanation:
The Lewis structure in the image is incorrect because hydrogen can only form one bond. Hydrogen has only one valence electron, and in a molecule, it shares that electron to complete its nearest noble gas configuration, which is just a pair of electrons, not an octet. This means choice (c) 'Hydrogen can only form one bond' is the correct answer. The correct Lewis structure of CH should show the carbon atom forming a single bond with the hydrogen atom.