Which of the following compounds would have the largest retention factor in a TLC experiment with a silica stationary phase and hexane mobile phase?

W) Benzene

X) Benzoic acid [ben-ZOH-ik]

Y) Phenylacetone [fennel-ASS-eh-tone]

Z) Benzyl [BEN-zil] methyl ether
X) BENZOIC ACID