Task: Question Answering
Input (English): Question: The difference in solute concentration inside and outside the cell gives rise to an osmotic pressure: 
 Options:  <1> Whose measurement allows to determine molar masses of small molecules. <2> Due to the passage of solute through the cell membrane. <3> That corresponds to the pressure that must be applied to interrupt the passage of solvent through the membrane. <4> That causes a difference of chemical potential of the solvent on both sides of the membrane. <5> Whose effect is minimal and complicated to measure.
Output (English): 3