Which of the following relation is correct for first - order Bragg's diffraction?

Which of the following relation is correct for a first order reaction? (k=rate constant, r=rate of reaction , c=conc. Of reactat

Which of the following relation is correct for a first order reaction? (K=rate constant, r=rate of reaction, c = cone, of reactant)

Which of the following is correct for a first order reaction ?

Which of the following graph is correct for a first order reaction ?