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
Damage to which of the following nerve result in winging of scapula? 
Select and explain. 
A. Dorsal scapular nerve, B. Long thoracic nerve, C. Suprascapular nerve, D. Nerve to the subclavius
B: Long thoracic nerve
Answer: B: Long thoracic nerve 
Explanation: Long thoracic nerve branches from the C5-C7 roots. It descends posteriorly to the roots of the plexus and the axillary aery and along the lateral surface of the serratus anterior muscle, with the lateral thoracic aery. It is one of the few nerves found superficial to the serratus anterior muscle. Damage to this nerve cause winging of the scapula.