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
[{'content': 'The skin of the neck is supplied by: \nSelect and explain. \nA. 1st, 2nd, 3rd cervical nerves., B. 2nd, 3rd, 4th cervical nerves., C. 3rd, 4th, 5th cervical nerves., D. All of the above.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]