$\Pi \propto \mathrm{C} \Rightarrow \Pi \propto \frac{1}{\mathrm{M}_{\mathrm{w}}}$
Glucose $\Rightarrow \mathrm{M}_{\mathrm{w} 1}=180$
Urea $\Rightarrow \mathrm{M}_{\mathrm{w} 2}=60$
Sucrose $\Rightarrow \mathrm{M}_{\mathrm{w} 3}=342$
$\mathrm{P}_{2}>\mathrm{P}_{1}>\mathrm{P}_{3}$