A) elevation
B) flexion
C) extension
D) retraction
Correct Answer: A
Solution :
Elevation involves the raising of a part, eg, standing on tiptoe, massetor raises the lower jaw, etc. Flexion involves the bending of a part over another, eg, forearm towards upper arm by biceps while extension involves straightening of a bent part, eg, bent forearm is straightened or extended by triceps.
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