Induced fit theory of enzyme action was given by
A. Kuhne
B. Buchner
C. Fischer
D. Koshland.

Hint:It is a theory for enzyme substrate interaction to explain that only the exact substrate is able to initiate the proper arrangement of the active site that will enable the enzyme to perform its catalytic function.

Complete answer:
To answer this question, first, we need to know about induced fit theory. The induced fit theory is a theory for enzyme-substrate interaction. It describes that only the proper substrate is capable of inducing the proper alignment of the active site that will allow the enzyme to carry out its catalytic function. It also mentioned that the active site continues to change until the substrate is completely bound to it, at which point the final shape and charge is figured out.
Now, let us find the solution from the option.
The induced fit theory mentioned by Daniel Koshland in 1958. It is the more agreed model for enzyme-substrate complex comparison to the lock-and-key model. In the lock-and-key model, the interaction of the substrate and the enzyme is likened to a key (the substrate) that is highly specific to the lock (the active site of the enzyme).

Thus, the correct option is D.i.e. Koshland.

Note:Contrasting the lock-and-key model, the induced fit theory describes that enzymes are rather flexible structures in which the active site constantly reshapes by its inter-linkages with the substrate until the time the substrate is fully bound to it.