Which of the following is the correct sequential order in which the given enzymes of Kreb's cycle are formed after a molecule of acetyl CoA enters the cycle -

• A. Ketoglutarate, Oxaloacetate, Citrate
• B. Citrate, Oxaloacetate, Ketoglutarate
• C. Oxaloacetate, Ketoglutarate, Citrate
• D. Citrate, Ketoglutarate, Oxaloacetate