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
Not an example of substrate level phosphorylation 
Select and explain. 
A. Phosphofructokinase, B. Succinyl thiokinase, C. Pyruvate kinase, D. Phosphoglyccerate kinase
A: Phosphofructokinase
Answer: A: Phosphofructokinase 
Explanation: Repeated question