What is the formal name for a fatty acid with 18 carbons and one double bond starting at the 9th carbon?

• A. 18:1 (delta 9) octadecanoic acid
• B. 18:0 (delta 9) octadecanoic acid
• C. 18:2 (delta 9) octadecanoic acid
• D. 18:1 (omega 9) octadecanoic acid

Answer: (A)