" Choose the correct option: In a first order reaction,reactant concentration 'C' varies with time 't' as "

In a first ordr reaction, reactant concentration 'C' varies with time 't' as

For a first order reaction, the concentration of reactant :

In a first order reaction fraction of the total concentration of the reactant varies with time 't' is equal to

With the help of a graphical representation explain how the rate of a first order reaction varies with the initial concentration of reactant.