Total number of dehydrogenases in Kreb's cycle: (A) 3, (B) 2, (C) 4, (D) 5
Answer is C. There are 4 dehydrogenase in TCA cycle :-

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