This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Anatomy
The upward extension of thyroid swelling is prevented by which of the following structure attached to thyroid cailage 
Select and explain. 
A. Sternothyroid, B. Pretracheal fascia, C. Ligament of berry, D. Thyrohyoid membrane
B: Pretracheal fascia
Answer: B: Pretracheal fascia 
Explanation: Pretacheal fasciaprevents upward extension of thyroid swelling. It goes antero-lateral to trachea and continues posteriorly around oesophagus and as pharynx as buccopharyngeal fascia. It encloses: Trachea and oesophagus Thyroid gland Ant. Neck muscles