This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Biochemistry
Which of the following enzymes does not take pa in TCA cycle? 
Select and explain. 
A. Citrate synthase, B. Iso citrate dehydrogenase, C. Pyruvate dehydrogenase, D. Malate dehydrogenase
C: Pyruvate dehydrogenase
Answer: C: Pyruvate dehydrogenase 
Explanation: Enzymes involved in TCA cycle are : Citrate synthase forms citrate Aconitase Iso citrate dehydrogenase Alpha KG dehydrogenase Succinyl co A synthase Succinate dehydrogenase Fumerase Malate drhydrogenase Ref: Biochemistry by U. Satyanarayana 3rd edition Pgno : 254