67.有關致甲狀腺腫物質（goitrogenic substances）的描述，何者正確？①糖皮質素 （glucocorticoid） ②氯胺酮（ketamine） ③磺胺類藥（sulfonamide） ④硫氰酸鹽 （thiocyanate）
(A)①②③
(B)①②④
(C)①③④
(D)②③④

Cruciferous plants (genus Brassica) are goitrogenic because they contain glucosinolates (sulfur-containing glucosides) that are converted in the intestine to glucose and by-products, such as isothiocyanates, by the enzyme myrosinase derived from the plant or from the intestinal tract.

Thiocyanates, perchlorates, and certain other ions compete with iodide for uptake by thyroid follicular cells.

Phenobarbital, rifampin, and certain other medicinal compounds are goitrogenic because they increase the degradation of T4 and T3.