Consider the following liquids with similar molar masses. Predict which liquid has the weakest intermolecular attraction based on surface tension…

Consider the following liquids with similar molar masses. Predict which liquid has the weakest intermolecular attraction based on surface tension data.
Select one:
A. ethyl formate (surface tension @ 20 °C = 24 dynes/cm)
B. propionic acid (surface tension @ 20 °C = 27 dynes/cm)
C. propyl chloride (surface tension @ 20 °C = 18 dynes/cm)
D. ethyl ether (surface tension @ 20 °C = 17 dynes/cm)
E. butyl alcohol (surface tension @ 20 °C = 25 dynes/cm)