Answer: Option (1) is the correct answer.
Step-by-step explanation:
A chain of carbon and hydrogen atoms also known as hydrocarbons when attached to at least one carboxylic acid functional group (COOH) then it is known as a fatty acid.
For example,
is lauric acid and it is a saturated fat.
Whereas a hydrocabon that contain atleast one "-OH" functional group is known as an alcohol.
A hydrocabon that contain atleast one "-CHO" functional group is known as an aldehyde.
A hydrocabons that contain atleast one "O=C-O" functional group is known as an ester.
Thus, we can conclude that a fatty acid consists of -COOH bonded to a long chain of hydrocarbons.