Test to diagnose thiamine deficiency ?
Ans. is 'a' i.e., RBC transketolase 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..
RBC transketolase
FIGLU excretion
Methyl-malunic acid in urine
Histidine load test