This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
Key enzyme of gluconeogenesis are all except 
Select and explain. 
A. Pyruvate carboxylase, B. PEP carboxykinase, C. Pyruvate kinase, D. Glucose-6-phosphatase
C: Pyruvate kinase
Answer: C: Pyruvate kinase 
Explanation: Repeated question