Explanation

Zinc can reduce only ions of metals below it in the reactivity series. Copper, hydrogen and silver are all below zinc, so Zn reduces Cu²⁺, H⁺ and Ag⁺. Aluminium lies above zinc (E° Al³⁺/Al = −1.66 V vs Zn²⁺/Zn = −0.76 V), so metallic zinc cannot reduce Al³⁺. Hence (D) Al³⁺ will not be reduced by zinc.