# Fructose reduces Tollen’s reagent due to

$\begin{array}{1 1}(a)\;\text{Presence of ketonic group}\\(b)\;\text{Presence of }NH_4OH\text{ in Tollen's reagent}\\(c)\;\text{Rearrangement of fructose into a mixture of glucose fructose and mannose}\\(d)\;\text{Both (b) and (c)}\end{array}$

Fructose is a ketone and thus should not act as a reducing agent, but due to the presence of $NH_4OH$ in Tollen’s reagent it rearranges into a mixture of glucose, fructose and mannose.
Hence (d) is the correct answer.