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Anatomy General 7ea949f5

Phrenic nerve is

A
Motor nerve to diaphragm
B
Arises chiefly from 3rd cervical nerve, also receives contribution from 4th and 5th cervical nerves
C
The nerve runs vertically on the anterior surface of scalenus anterior
D
It lies anterior to prevertebral fascia
High-Yield Explanation
Phrenic nerve is a mixed nerve, mainly arises from 4th cervical nerve. It lies behind prevertebral fascia and in front of scalenus anterior.

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