Which of the following has least freezing point?

Depression in freezing point is a colligative property (i.e. depends only upon the number of particles of solutes). Thus, the compound which produces maximum number ofions will have the least freezing point.∴Concentration is same                  Sucrose →No ions NaCl     →Na+ +Cl-⏟                     Two ions                 CaCl2→     Ca2+2Cl-⏟                    Three ions                Glucose → No ions Thus, 1%  CaCl2 will have the least freezing point.