題目下列何者無法測試維生素B6\mathrm{B}_{6}B6的營養狀況?A.希林氏測驗(Schilling test)B.色胺酸負荷試驗(tryptophan loading test)C.甲硫胺酸負荷試驗(methionione loading test)D.紅血球轉胺酶活性(erythrocyte transaminase activities)官方答案A