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: Surgery
Which neck swelling moves on swallowing - 
Select and explain. 
A. Submandibular salivary gland, B. Thyroid gland, C. Supraclavicular lymph gland, D. Sternomastoid tumour
B: Thyroid gland
Answer: B: Thyroid gland 
Explanation: None