題目下列那些維生素參與丙酮酸去氫酶(pyruvate dehydrogenase)催化的反應?①B1\mathrm{B}_{1}B1 ②B2\mathrm{B}_{2}B2 ③niacin ④folate ⑤pantothenate ⑥B6\mathrm{B}_{6}B6 ⑦lipoic acidA.①③④⑤⑥B.②③⑤⑥⑦C.①②④⑤⑦D.①②③⑤⑦官方答案D