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
Which gland is enclosed by pretracheal fascia? 
Select and explain. 
A. Parotid gland, B. Thyroid gland, C. Submandibular gland, D. Sublingual gland
B: Thyroid gland
Answer: B: Thyroid gland 
Explanation: None