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Which one of the following is the correct description of a certain part of a normal human skeleton?

A)  Parietal bone and the temporal bone of skull are bones joined by fibrous joint.

B)  First vertebra is an axis which articulates the occipital condyles.

C)  The 9th and 10th pairs of ribs are called the floating ribs.                           

D)  Glenoid cavity is a depression to which the thigh bone articulates.