This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
[{'content': 'Which amongst the following is not a branch from the root of brachial plexus? \nSelect and explain. \nA. Branches to longus colli and scaleni muscles, B. Long Thoracic Nerve, C. Dorsal Scapular Nerve, D. Nerve to subclavius', 'role': 'user'}, {'content': 'Answer: D \nExplanation: BRANCHES FROM ROOTS ARE: Nerve to serratus anterior {long thoracic nerve}{C5-C7}. It only supplies serratus anterior muscle. Nerve to rhomboids {dorsal scapular nerve}-(C5). It supplies rhomboid major and rhomboid minor muscles. Branches to longus colli and scaleni muscles {C5-C8} and branch to phrenic nerve{C4}. Branches of trunks: Suprascapular(C5,C6) Nerve to subclan(C5, C6) REF: BD Chaurasia edition 7th page no:58.', 'role': 'assistant'}]