Which one of the following statement is incorrect about enzyme catalysis?

The correct option is B Enzymes are least reactive at optimum temperature
As we have seen in the video, enzymes are denatured at high temperatures. They are obviously protein molecules which we already know.
The lock and key mechanism suggests that enzymes are very specific in their action.

So, the incorrect option is C. Enzymes are actually very reactive at optimum temperatures which is between $36-{40}^{\circ }C$ which is the operating temperature of the human body.