Correct Answer - D
`C_(6)H_(5)NH_(3)Cl rarr C_(6)H_(5)NH_(3)^(o+)+Cl^(ө)`
`Ca(NO_(3))_(2) rarr Ca^(2+) + 2NO_(3)^(ө)`
`La(NO_(3))_(3) rarr La^(3+) + 3NO_(3)^(ө)`
Glucose does not dissociate. So it has the minimum number of particles, and therefore, it shows minimum depression in freezing point. So it has the maximum freezing point.