Test to diagnose thiamine deficiency -
RBC transketolase
FIGLU excretion
Methyl-malunic acid in urine
Histidine load test
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.
Vitamins