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The rate of the forward reaction equals the rate of the reverse reaction.

Explanation:

To know which option is correct, it important that we know what dynamic equilibrium is all about.

We'll begin by defining chemical equilibrium.

A chemical system is said to be in chemical equilibrium when there is no observable change in the properperties of the chemical system.

Dynamic equilibrium on the other hand can be defined as a state in which the forward and backward reaction is occurring at the same time. Thus, in dynamic equilibrium, the rate of the forward reaction is equal to the rate of the backward (i.e reverse) reaction.