3. 膝關節 (Knee joint) 屬於下列何種關節?(A) 滑動關節 (gliding joint)(B) 鞍關節 (saddle joint)(C) 屈戍關節 (hinge joint)(D) 髁狀關節 (condylar joint)(E) 球窩關節 (ball-and-socket joint)