What does the sacral plexus innervate?
A. Diaphragm
B. Medial leg and foot
C. Posterior thigh and most of the leg and foot
D. None of the above
ANS: C
Rationale: The sacral plexus innervates the posterior thigh and most of the leg and foot. Unlike the other plexuses, which contain sympathetic axons, the sacral plexus contains parasympathetic axons.
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