The respiratory quotient is a dimensionless number used to calculate the basal metabolic rate. Which among the following substances have the highest value of RQ?

Oleic acid is a fatty acid that occurs naturally in various animal and vegetable fats and oils. It is emitted by the decaying corpses of a number of insects, including bees and Pogonomyrmex ants. Its RQ value is 0.71. Oxalic acid is a colorless crystalline solid that dissolves in water to give colorless solutions. Its RQ value is 4.