Which of the following won't react with Fehling's solution ?
Maltose
Fructose
Lactose
Sucrose
As we have learnt,
Non-reducing Sugar -
They don't have free aldehyde or ketone group and thus cannot reduce Fehling solution and Tollen's reagent.
Eg. Sucrose , raffinose , trehalose .
Hence, the correct answer is Option (4)