Tricaboxylic acids of Kreb's cycle are
| A. |
citric acid, isocitric acid and malic acid |
| B. |
citric acid, isocitricacid and and oxalosucciic acid |
 |
| C. |
oxalosuccinic acid, citric acid and ketoglutaric acid |
| D. |
fumaric acid, malic acid and citric acid |