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 investing layer of deep cervical fascia splits to enclose all of the following, except: \nSelect and explain. \nA. Parotid and submandibular glands, B. Sternocleidomastoid and vertebral arteries, C. Trapezius and sternocleidomastoid muscles, D. Suprasternal and supraclavicular spaces', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The investing layer of deep cervical fascia splits to enclose:\n\nMuscles—trapezius and sternocleidomastoid.\nSalivary glands— parotid and submandibular glands.\nSpaces— suprasternal and supraclavicular spaces.', 'role': 'assistant'}]