2.關節液抽取檢查常在下列疾病執行？(1)痛風關節炎；(2)感染性關節炎；(3)全身性紅斑性狼瘡 (SLE)；(4)全身性硬化症 ( Systemic sclerosis)；(5)僵直性脊椎炎(Ankylosing spondylitis)
(A)(1)+(2)
(B)(2)+(3)
(C)(3)+(4)
(D)(4)+(5)
(E)(5)+(1)