A rounded projection that enters into the formation of a joint is a:
A) fossa.
B) trochanter.
C) sinus.
D) condyle.
D
Explanation: A) A fossa is a shallow depression in or on a bone.
B) A trochanter is a bony projection below the neck of the femur.
C) A sinus is an air cavity in a bone.
D) Correct.
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