Answer: Option (a) is the correct answer.
Explanation:
Equilibrium is defined as the state in which rate of forward reaction is equal to the rate of backward reaction.
Also, in an equilibrium concentration of both reactants and concentration of products are the same.
For example, when substance A is converting into substance B then rate of conversion of substance B will be equal to substance A.
Therefore, we can conclude that when a system is in dynamic equilibrium, the input of the system is equal to the output of the system.
