Paracetamol is made by synthesising it from 4-aminophenol. Chromatography was performed on an impure paracetamol sample. The outcome is shown below (not to scale). The paracetamol sample contained only 4-aminophenol as the impurity. What is the $R_f$ value of 4-aminophenol?
- A0.49
- B0.65
- C0.74
- D1.35