A pure compound is analyzed by normal phase TLC in four different solvents. Considering Rf values as reported below, which solvent system is most polar?Solvent 1) 0.87,Solvent 2) 0.25Solvent 3) 0.33Solvent 4) 0.78Group of answer choicesSolvent 2Solvent 4Solvent 3Solvent 1