49 檸檬酸循環(Citric acid cycle)中那個酵素可催化 FADH2的產生?(A)異檸檬酸脫氫酶(Isocitrate dehydrogenase)(B)蘋果酸脫氫酶(Malate dehydrogenase)(C)a-酮戊二酸脫氫酶(a-Ketoglutarate dehydrogenase)(D)琥珀酸脫氫酶(Succinate dehydrogenase)