33 一位 28 歲女性最近半年來臉頰部有紅斑(如附圖)及手指、手腕和肩膀有偶發性疼痛。曾經被醫師懷疑為紅斑性狼瘡。請問下列那些檢查對疾病的診斷最有幫助?
① skin biopsy ② anti-nuclear antibodies ③serum complements C3 and C4 level ④rheumatoid factors ⑤complete blood routine ⑥ anti-dsDNA antibodies ⑦ anti-SS-A/anti-SS-B ⑧ serum electrophoresis ⑨ LE test(A)①④⑧(B)③⑦⑨(C)②③⑥(D)④⑤⑦