Anoncompetitive inhibitor
a. binds to the enzyme at a site other than the active site
b. is structurally related to the substrate
c. does not affect the value of vmax
d. decreases the value of km

I believe the correct response out of the listed possible options would be that the non competitive inhibitor would chemically bind to the enzyme at a particular site other than that of the active site, this causes a slight change to the shape of the active site, affecting the affinity for the substrate to interact and bind with the active site.

Ais the answer for you