In folic acid deficiency which of the following is excreted in urine

Folic acid is the coenzyme for the conversion of FIGLU to glutamate. Block in this step leads to increased excretion of FIGLU in urinrFIGLU Excretion Test It is a sensitive indicator for folic acid deficiency. About 5 g of histidine is given three times at 4hourly intervals. Urine is collected for 24 hours after the initial dose. Normally less than 30 mg of FIGLU is excreted per day; the value is increased in folate deficiency.Reference Textbook of Biochemistry DM Vasudevan 7th edition: page no 244