How many of the following reaction product formation takes place by Hoffmann's rule?

Question

How many of the following reaction product formation takes place by Hoffmann's rule? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

(I,II,III,IV) Crowded base gives Hoffinann's product.

Q. How many of the following reaction product formation takes place by Hoffmann's rule?