Answer: Option B
:
B
In the image given here the substrates do not fit into the enzyme active site like a lock and key, instead the substrates induces a change in the enzyme active site on binding the enzyme, thereby enabling the interaction between the substrates and formation of products. Therefore the representation shown here is the induced fit model of enzyme action.
In the lock and key model the substrate structure has to be the right fit for the enzyme active site, like that of a key and its lock. Similar to how akeyhas to be the correct one for alock, no reaction takes place if an incorrect substrate tries to bind the enzyme.