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': 'Torticollis or Wryneck is due to \nSelect and explain. \nA. Sternocleidomastoid and trapezius, B. Sternocleidomastoid and Platysma, C. Trapezius and sternohyoid, D. Trapezius and omohyoid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is due to spasm of the muscles supplied by spinal accessory nerve i.e. sternocleidomastoid and trapezius.', 'role': 'assistant'}]