49.有關手部及手指變形與產生原因之配對,下列何者正確?①鈕扣孔式變形-伸肌頂罩之中央肌鍵延伸斷裂
(boutonniere deformity - central tendinous slip of extensor hood rupture) ②伸肌過緊-伸指共肌在近端指間 關節近端沾黏(extensor plus - adhesion of extensor digitorum communis tendon proximal to proximal interphalangeal joint) ③槌狀指-伸指肌肌腱在中節指骨斷裂(mallet finger - rupture of the extensor tendon at middle phalanx) ④扳機指-屈指肌肌腱腱鞘肥厚(trigger finger - thickening of flexor tendon sheath) (A)僅①② (B)僅③④ (C)僅②③ (D)僅①④