Arachidonic acid and pge1 are both carboxylic acids with atoms. the differences are that arachidonic acid contains and no other functional groups, whereas pge1 has . in addition, a part of the pge1 chain forms a.

             Arachidonic Acid and PGE₁ are both carboxylic acids with Twenty Carbon atoms. The differences are that Arachidonic acid contains Four cis Double Bonds and no other functional groups, whereas PGE₁ has One Trans Double Bond, Two Hydroxyl and One Ketone Functional Groups.. In addition, a part of the PGE₁ chain forms a Five Membered Ring.

Structures of Both Arachidonic Acid and PGE₁ are shown Below,

Sorry i think the answer is b