6.有關膽酸(bile acid)的敘述，何者正確？(1)飲食成分中不含膽酸(2)腸子合成的膽酸為初級膽酸(primary bile acid) (3)經由腸子吸收的膽酸會回到肝臟，此過程有問題會導致steatorrhea (4)cholestyramine可用於bile acid diarrhea (5)deoxycholic acid和lithocholic acid為初級膽酸
(A)(1)+(2)+(3)
(B)(2)+(3)+(4)
(C)(3)+(4)+(5)
(D)(1)+(3)+(4)
(E)(2)+(4)+(5)