Test to diagnose thiamine deficiency -: (A) RBC transketolase, (B) FIGLU excretion, (C) Methyl-malunic acid in urine, (D) Histidine load test
Answer is A. Ans. is 'a' i.e., RBC transketolase o Thiamine diphosphate is also the coenzume for transketolase, in the pentose phosphate pathway. Therefore, thiamine nutritional status is best assessed by erythrocyte (preferred) or whole blood transketolase activity.