This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CSOM and its Complications, Subject name: ENT
[{'content': "Bezold ' s abscess is located in - \nSelect and explain. \nA. Submandibular region, B. Sternocleidomastoid, C. Digastric triangle, D. Infratemporal region", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Sternomastoid muscle", 'role': 'assistant'}]