A student carried out chromatography to investigate a green food colouring. The chromatogram produced is shown. The table gives some yellow food dyes and their $R_f$ values. Which yellow food dye is present in the green food colouring?
- AQuinoline Yellow, $R_f = 0.48$
- BSunset Yellow, $R_f = 0.32$
- CTartrazine, $R_f = 0.69$
- DYellow 2G, $R_f = 0.82$