This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: TCA Cycle, Subject name: Biochemistry
Total number of dehydrogenases in Krebs cycle 
Select and explain. 
A. 3, B. 2, C. 4, D. 5
C: 4
Answer: C: 4 
Explanation: There are total 4 dehydrogenases present in kreb's cycle: 1. Isocitrate dehydrogenase 2. a- Ketoglutarate dehydrogenase complex 3. Succinate dehydrogenase 4. Malate dehydrogenase