This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Upward extension of thyroid swelling is PREVENTED by what attatched to thyroid cailage ? \nSelect and explain. \nA. Pre tracheal fascia, B. Ligament of Berry, C. Thyrohyoid membrane, D. Sterno thyroid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pretrachial layer extends inferiorly from the base of the skull posteriorlyand the hyoid bone and thyroid cailage anteriorly and laterally and provide fascial sheaths of varying thickness for the thyroid gland larynx trachea pharynx and esophagus inferiorly it continues into superior mediastinum along the great vessels and fuses with the fibrous pericardium. ref : bd chaurasia', 'role': 'assistant'}]