This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
All of the following are true about phrenic nerve,except - 
Select and explain. 
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
A: It is purely motor nerve
Answer: A: It is purely motor nerve 
Explanation: Phrenic nerve arises from ventral rami of C3-5 and had both motor and sensory branches.