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Question

Which of the following joints rotate freely (360°)?

A
Hinge joint
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B
Ball & Socket Joint
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C
Immovable joint
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D
Neck joint
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Solution

The correct option is B Ball & Socket Joint
The smooth joint, with a hemispherical head that fits within a cuplike depression is called the ball and socket joint. This type of joint helps in rotational or circular movements, as one bone is captivated into the hollow space of another bone. This is the most freely moving joint. An example of a ball and socket joint are the shoulders and hip.

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