Increasing order of osmotic pressure.
I. 0.1 M glucose II.1% urea solution
III. 0.1 M common salt
III < II < I
III < I < II
I < II < III
II < I < III
Osmotic pressure is higher if Ceff is higher
0.1 M Glucose < 1% urea (≈0.167 M) < 0.1 M NaCl