Insulin (C2H10O5)n is dissolved in a suitable solvent and the osmotic pressure (p) of solutions

Insulin (C2H10O5)n is dissolved in a suitable solvent and the osmotic pressure (p) of solutions of various concentrations (g/cm3) C is measured at 20 °C. The slope of a plot of p against C is found to be 4.65 × 10–3. The molecular weight of the insulin is -
(1) 4.8 × 105 (2) 9 × 105
(3) 3 × 105 (4) 5.16 × 106

Insulin(C2H10O5)ndissolved