Given below are two statements:

Statement I: Retardation factor $\left({\mathrm{R}}_{\mathrm{f}}\right)$  can be measured in meter/centimeter:

Statement II: ${\mathrm{R}}_{\mathrm{f}}$ value of a compound remains constant in all solvents.

Choose the most appropriate answer from the options given below:

${\mathrm{R}}_{\mathrm{f}}=$ Distance travelled by a substance from the Baseline/ Distance travelled by solvent from the Baseline .It has no units.

Different solvent have different capillaries. Different compounds have different mobilities/solubility's in different solvents.