Final answer:
The correct answer is Pyruvate Carboxylase.
Step-by-step explanation:
The correct answer to the question is a) Pyruvate Carboxylase. In gluconeogenesis, pyruvate is converted into oxaloacetate through the action of pyruvate carboxylase. This is the first step in the reverse pathway of glycolysis, where glucose is synthesized from non-carbohydrate sources.