Mead acid (20:3) is an ω-9 fatty acid in the human body. A high amount of mead acid in the body indicates a deficiency of essential fatty acids. On the other hand, stearidonic acid (18:4) is an ω-3 fatty acid found in hemp and blackcurrant. Draw the skeletal structures of mead acid and stearidonic acid. 

• A.
• B.
• C.
• D.

Answer: (D)