Which of the Following Is NOT Correct Regarding Competitive Inhibition

Which of the following is NOT correct regarding competitive inhibition?

A) For a group-specific enzyme,one substrate would be a competitive inhibitor of reactions of the other possible substrate.
B) Sometimes a product of an enzyme-catalyzed reaction is a competitive inhibitor of its own production.
C) Competitive inhibitors usually interact with the enzyme at the binding site for a substrate.
D) In the presence of a competitive inhibitor,the apparent Km would be altered and V_max would be decreased.