This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid Gland, Subject name: Surgery
This young girl presented with swelling in the neck which moves on deglutition. She complaints of dyspnea and venous engorgement in face. She is examined with following test. The name of this sign is: 
Select and explain. 
A. Pemberton sign, B. Laheys test, C. Criles test, D. Gifford test
A: Pemberton sign
Answer: A: Pemberton sign 
Explanation: Ans. (a) Pemberton sign* Pemberton sign is done in cases where lower border of the thyroid swelling is not visible* This test is to confirm that retrosternal goiter is causing compression.