What is the root value of phrenic nerve?
A. C2, C3, C4
B. C3, C4, C5
C. C4, C5, C6
D. C5, C6, C7
Answer:B
What is the root value of phrenic nerve?
A. C2, C3, C4 B. C3, C4, C5 C. C4, C5, C6 D. C5, C6, C7