Biochemistry Enzyme-deficient in lactic acidosis caused by thiamine deficiency is? A Pyruvate dehydrogenase B Succinate thiokinase C Cis aconitase D Isocitrate dehydrogenase 💡 Explanation Enzyme-deficient in lactic acidosis caused by thiamine deficiency is? ✓ Correct Answer: A. Pyruvate dehydrogenase