Which of the following fatty acid is a precursor of arachidonic acid?: (A) Linoleic acid, (B) Linolenic acid, (C) Oleic acid, (D) Palmitoic acid
Answer is A. Arachidonic acid is a 20-carbon polyunsaturated fatty acid (5,8,11,14-eicosatetraenoic acid) that is derived from dietary sources or by conversion from the essential fatty acid linoleic acid. Ref: Robbins 8th edition, Chapter 2.