Which of the following statements is/are correct for K_f ?
I. K_f depends upon the nature of solvent.
Il. K_f is known as freezing point depression constant / molal depression constant.
lll. K_f is known as cryoscopic constant.
    Select the correct conclusion derived from the equation.

The proportionality constant K f depends on the nature of solvent and is known as freezing point depression constant or molal depression constant or cryoscopic constant. Unit of ${\mathrm{K}}_{\mathrm{f}}\text{ is }\mathrm{K} \mathrm{kg} {\mathrm{mol}}^{-1}$.
                ${\mathrm{M}}_2=\frac{{\mathrm{K}}_{\mathrm{f}}\times {\mathrm{w}}_2\times 1000}{{\mathrm{\Delta T}}_{\mathrm{f}}\times {\mathrm{w}}_1}$
where w₂ gram of solute having molar mass as M₂ is present in w₁ gram of solvent.