下列哪种维生素在碱性条件下可被铁氰化钾氧化生成硫色素,溶于正丁醇显蓝色荧光?()
A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251127/8503886_0.jpg"> B
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251127/8503886_0_1.jpg"> C
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251127/8503886_0_2.jpg"> D
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251127/8503886_0_3.jpg"> E
维生素C