This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Enolase is inhibited by: 
Select and explain. 
A. Chloride, B. Cyanide, C. Fluoride, D. All of the above
C: Fluoride
Answer: C: Fluoride 
Explanation: Enolase is inhibited by fluoride, and when blood samples are taken for measurement of glucose, it is collected in tubes containing fluoride to inhibit glycolysis. Ref: Harper 28th edition, chapter 17.