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
Total number of dehydrogenases in Kreb's cycle 
Select and explain. 
A. 3, B. 2, C. 4, D. 5
C: 4
Answer: C: 4 
Explanation: There are 4 dehydrogenase in TCA cycle :-

(i) Isocitrate dehydrogenase, (ii) α -ketoglutarate dehydrogenase, (iii) Succinate dehydrogenase, (iv) Malate
dehydrogenase.