Which of the following structures allows motion around a single axis and only permits flexion and extension?

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Hinge joints allow motion around a single axis permitting only flexion and extension (the elbows and knees are examples of hinge joints).
Suture joints are thin layers of dense irregular connective tissue that connect bones of the skull.
Ball-and-socket joints consist of ball-like surface of one bone fitting to a cup-like depression of another bone permitting free movements around three axes (the shoulders are examples of ball-and-socket joints)
Short bones are cube-shaped bones with nearly equal length and width.

Which of the Following Structures Allows Motion Around a Single