Case: Read the paragraph and answer the following questions

      There are many phenomena which we observe in nature or at home. For example, raw mangoes shrivel when pickled in brine (salt water). If we look into this processes we find one thing common in all, that is, all these substances are bound by membranes. These membranes appear to be continuous sheets or films, yet they contain a network of sub microscopic holes or pores. Membranes having this kind of properties are known as semipermeable membranes (SPM).  If this membrane is placed between the solvent and solution the solvent molecules will flow through the membrane from pure solvent to the solution. This process of flow of the solvent is called osmosis. The flow of the solvent from its side to solution side across a semipermeable membrane can be stopped if some extra pressure is applied on the solution.  This pressure has been found to depend on the concentration of the solution.

Osmotic pressure depends on?

Both of the above 

The answer is Option 3: Both of the above.

Osmotic pressure is a colligative property, which means that it depends on the number of solute particles in solution, but not on their chemical identity. The more solute particles there are in solution, the higher the osmotic pressure will be.

Osmotic pressure also depends on temperature. As the temperature increases, the kinetic energy of the solute particles increases, and they are more likely to move from the pure solvent to the solution. This increases the osmotic pressure.

So, the osmotic pressure of a solution depends on both the temperature and the molar concentration of the solute.

Option 1 (temperature) and Option 2 (molar concentration of the solvent) are both correct, so the answer is Option 3. Option 4 (none of the above) is incorrect.