Gold numbers of protective colloids A, B, C and Dare 0.50, 0.01, 0.10 and 0.005, respectively. The correct order of their protective powers is

Gold numbers of protective colloids A,B,C and D are 0.50,0.01,0.10 and 0.005 respectively. The correct order of their protective powers is $\mathrm{A}(0.50)<\mathrm{C}(0.10)<\mathrm{B}(0.01)<\mathrm{D}(0.005)$

Higher is the value of gold number, lower is the protective power.