A, B and C are three complexes of Chromioum with the empirical formula H12O6Cl3Cr. All the three complexes have Cl and H2O molecules as the ligands. Complex A does not react with conc. H2SO4. Complexes B and C lose 6.75% and 13.5% of their original weight respectively on heating with conc. H2SO4. Identify A, B and C.