Difference between Associative and Diassociative

The key difference between associative and dissociative mechanism is that the associative mechanisms are characterized by the binding of the attacking nucleophile to give a discrete and detectable intermediate followed by the loss of another ligand whereas the dissociative mechanisms are characterized by a rate.

The key difference between associative and dissociative mechanism is that the associative mechanisms are characterized by the binding of the attacking nucleophile to give a discrete and detectable intermediate followed by the loss of another ligand whereas the dissociative mechanisms are characterized by a rate-determining step that involves the release of a ligand from the coordination sphere of the metal that undergoes the substitution.

the answer to this question is d

answer; i believe the correct answer is (8) eight.