Answer:
The correct option is: c. no double bonds within the hydrocarbon chain
Explanation:
Fatty acids are the simple lipid molecules, that are insoluble in polar solvents. These are 4-28 carbon long carbohydrate chains with a terminal carboxyl functional group.
The two types of fatty acids are: Saturated fatty acids and Unsaturated fatty acids
Saturated fatty acids contains hydrocarbon chain that has zero or no carbon- carbon double bond (C=C bond).
Whereas, the hydrocarbon carbon of unsaturated fatty acids has one or more than one carbon- carbon double bond (C=C bond).