Question 19
Support and MovementFig. 4: Human arm --- part of skeleton of human arm
The bone labelled X in Fig. 4 is the

- A.ulna
- B.fibula
- C.radius
- D.humerus
- E.tibia
Show the answer and explanation
Answer: D (humerus)
Explanation
X is the single long bone of the upper arm, the humerus.