Which statement is/are correct about osmotic pressure ($\mathrm{\pi }$), volume (V)  and temperature (T)?

• A

  $\mathrm{\pi } \propto \frac{1}{\mathrm{V}}$, if T is constant.

• B

  $\mathrm{\pi }\propto \mathrm{T}$, if V is constant.

• C

  $\mathrm{\pi }\propto \mathrm{V}$, if T is constant.

• D

  $\mathrm{\pi }$V is constant, if T is constant.