Which of the following is an essential fatty acid

Concept-
-Essential fatty acids are those fatty acids which we get from the food supplement and that the body cannot produce. 
-It is used to fulfill the requirement of fatty acids for biological processes.

🔑Key Points:
-Linoleic acid (LA) is an omega-6 fatty acid which is considered an essential fatty acid because it cannot be synthesized by humans. 
-In all omega-6 (ω6 or n-6) fatty acids, the first double bond is located between the sixth and seventh carbon atom from the methyl end of the fatty acid.
-Linoleic acid is a colorless to straw colored liquid.
-It is a polyunsaturated fatty acid essential to human diet.
-After consumption and absorption by enterocytes lining the small intestines, linoleic acid is packaged into chylomicrons as phospholipids, triacylglycerols, or cholesterol esters and enters the general circulation (subclavian vein) via the thoracic duct.
-Linoleic acid is delivered to hepatic and extrahepatic tissues as chylomicrons are delipidated en route to and cleared by the liver during its transition to much smaller remnant particles.
-After cellular uptake, the fate of linoleic acid is determined by the needs of the tissue, i.e., incorporation into membrane phospholipids, desaturation and elongation, etc.
-The major dietary sources of linoleic acid are vegetable oils, nuts, seeds, meats, and eggs.
🔴Additional Information:Acetic acid-
-Acetic acid is an aliphatic organic acid.
-It is a hygroscopic, corrosive liquid with a vinegar-like odor.
-It can be synthesized by oxidizing acetaldehyde in the presence of manganese or cobalt salts.
-It is utilized for synthesizing acetic anhydride, cellulose acetate and acetic esters.
Propionic acid-
-Propionic acid is a short-chain saturated fatty acid comprising ethane attached to the carbon of a carboxy group. 
-It has a role as an antifungal drug. It is a short-chain fatty acid and a saturated fatty acid. It is a conjugate acid of a propionate.
-Propionic acid (PA) is used as a preservative in foods such as cheeses, baked goods, or additive for artificial fruit flavors.
Palmitic acid-
-Palmitic Acid is a saturated long-chain fatty acid with a 16-carbon backbone.
-Palmitic acid is found naturally in palm oil and palm kernel oil, as well as in butter, cheese, milk and meat.
-It is a long-chain fatty acid and a straight-chain saturated fatty acid. It is a conjugate acid of a hexadecanoate.