題目下列何者為docosahexaenoic acid(DHA)?A.20:5 n-3,△=5, 8, 11, 14, 17B.20:4 n-6,△=5, 8, 11, 14C.18:3 n-3,△=9, 12, 15D.22:6 n-3,△=4, 7, 10, 13, 16, 19官方答案D