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Locomotion and Movement
Question
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Sigmoid notch is formed by

  • cavity formed by humerus

  • cavity formed by radius-ulna

  • cavity formed by tibia-fibula

  • cavity formed by femur

Answer

B.

cavity formed by radius-ulna

Radius and ulna are the bones of the forearm which are closely held together. The ulna is the long bone and bears a deep sigmoid notch for articulation with the trochlea of the humerus.

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