(i) Blue voilet color with Ninhydrine → amino acid derivative. So it cannot be saccharide or sucralose. (ii) Lassaigne extract give +ve test with AgNO3. So Cl is present, -ve test with Fe4[Fe(CN)6]3 means N is absent. So it can’t be Aspartame or Saccharine or Alitame, so C is sucralose. (iii) Lassaigne solution of B and D given +ve sodium nitroprusside test, so it is having S, so it is Saccharine and Alitame.