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B
P - Hinge joint; Q - Ball and socket joint
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C
P - Pivot joint; Q - Hinge joint
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D
P - Hinge joint; Q - Gliding joint
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Solution
The correct option is B P - Hinge joint; Q - Ball and socket joint In the chart, 'P' is hinge joint and 'Q' is ball and socket joint.
∙ Hinge joints are like door hinge where only back and forth movement is possible. Eg. Fingers and toes, knee, elbow, etc. ∙ In ball and socket joints, one bone is hooked into hollow space of another bone. This type of joint helps in rotatory movement. Eg. Shoulders