Identify ' Z ' among the following

First step involves the reduction of nitrobenzene to aniline in presence of $\mathrm{Sn} \mathrm{in} \mathrm{HCl}$. Second step is a diazotization reaction  where aniline is converted to benzenediazonium chloride in presence of nitrous acid, and third step involves the reaction between benzene diazonium chloride and beta-naphthol to form 1-phenylazo-2-naphthol an orange red dye.