A.Union of ventral rami of 7th, 8th and 9th spinal nerves
B.Union of dorsal rami of 7th, 8th and 9th spinal nerves
C.Union of ventral rami of 8th, 9th and 10th spinal nerves
D.None of these
A.Union of ventral rami of 7th, 8th and 9th spinal nerves
B.Union of dorsal rami of 7th, 8th and 9th spinal nerves
C.Union of ventral rami of 8th, 9th and 10th spinal nerves
D.None of these