From the Following Terms, Select the Most Appropriate Term to Fill

From the following terms, select the most appropriate term to fill in the blank. Not all the terms are used.
-Which muscle movement turns the palms down or backward??

A) gastrocnemius
B) involuntary
C) triceps
D) pronation
E) eversion
F) adduction
G) voluntary
H) quadriceps
I) rotator cuff
J) hamstrings
K) supination
L) extension
M) syndrome
N) sprain
O) biceps
P) deltoid
Q) flexion
R) inversion
S) median
T) diagnosis
U) strain