The role of water-soluble vitamin in energy production is shown by the tricarboxylic acid cycle's (TCA) dependence on
a) ascorbic acid, thiamin, riboflavin and folate
b) niacin, ascorbic acid, folate and thiamin
c) folate, vitamin B₁₂, pyridoxine and ascorbic acid
d) thiamin, niacin, riboflavin, and pantothenic acid
e) pyridoxine, niacin, folate and riboflavin