The omega notation for a fatty acid is 22:5w-3, 6, 9, 12, 15. What is the corresponding delta notation for this fatty acid?

a. 22:5d-15, 12, 9, 6, 3
b. 22:5d-9, 12, 15, 18, 21
c. 22:5d-7, 10, 13, 16, 19
d. 22:5d-3, 6, 9, 12, 15