Which of the following pairs can be differentiated by Tollen's reagent ?

Which of the following pairs cannot be differentiated by Tollen's reagent ?

Which of the following pairs cannot be differentiated by Tollen's reagent ?

Which of the following compound can give test with Tollen's reagent and yellow precipitate with iodine in NaOH ?

Which of the following disaccharide will not reduce Tollen's reagent ?