Anatomy General d701646c All of the following are true about phrenic nerve,except - A It is purely motor nerve B It arise briefly from C4 spinal nerve C It is formed at the lateral order of scalenus anterior D Accessory phrenic is commonly a branch from the nerve to subclavius High-Yield Explanation Phrenic nerve arises from ventral rami of C3-5 and had both motor and sensory branches.