Match the following

(A) (iii), Anhydrous $\mathrm{ZnCl}_2+$ conc $\mathrm{HCl}$ called, i.e. as reagent and used to distinguish between $1^{\circ}$, $2^{\circ}, 3^{\circ}$ alcohols. (B) (iv), $\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$ called clemmensen reagent and used in conversion of carbonyl into alkane. (C) (ii), Tollen's reagent \left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+}$used as oxidising reagent. (D) (i), Stiphen reagent$\mathrm{SnCl}_2+\mathrm{HCl} used in reduction of nitrogen compounds.