When the system A + B <--> C + D is at dynamic equilibrium

Question

the forward reaction has stopped.
both the forward and the reverse reactions have stopped.
the reverse reaction has stopped
neither the forward nor the reverse reaction has stopped.

Answer 1

When the system A + B <--> C + D is at dynamic equilibrium, it means that both forward and reverse reactions are still occurring but at the same rate, resulting in no net change in the concentrations of the reactants and products. So, the correct option is "neither the forward nor the reverse reaction has stopped."