Of course the right answer is the third one: the enzyme is inactivated. If you still feel confused , the link below may be helpful: https://www.creative-enzymes.com/cate/Inhibitors_72.html
Enzymes are bio catalyst that can increase the rate of a bio chemical reaction occurring in the living organism. Enzymes work at optimum pH and temperature conditions.
Inhibitors may be defined as the substance that can bind with the substrate or its presence may decrease or inactivate the enzyme activity. The binding of an inhibitor may permanently shut down the enzyme activity and can inactivate it.
