a
(i) Blue voilet color with Ninhydrine \(\rightarrow\) amino acid derivative. So it cannot be saccharide or sucralose.

(ii) Lassaigne extract give + ve test with \(\mathrm{AgNO}_{3} .\) So \(\mathrm{Cl}\) is present, -ve test with \(\mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3}\) means \(\mathrm{N}\) is absent. So it can't be Aspartame or Saccharine or Alitame, so \(\mathrm{C}\) 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.