1.Fe3+\mathrm{Fe^{3+}}Fe3+ ions produce deep blue colouration when treated with reagent (R). R is:a.K3[Fe(CN)6]\mathrm{K_3[Fe(CN)_6]}K3[Fe(CN)6]b.K4[Fe(CN)6]\mathrm{K_4[Fe(CN)_6]}K4[Fe(CN)6]c.NH4SCN\mathrm{NH_4SCN}NH4SCNd.K2CrO4\mathrm{K_2CrO_4}K2CrO4Login to continueOnly logged in users canattempt or see the solution.