The pair of compounds in which both the compounds give positive test with Tollen's reagent is

Tollen's reagent or Tollen's test is one of the methods to detect the aldehyde group is a organic compound. Sugar molecules that have an aldehyde group can shows Tollen's test. 

Among the given options, glucose has an aldehyde group and Fructose has α-hydroxy ketones which undergoes enol formation and forms an aldehyde group.