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
Where is bruit heard in thyroid gland in Toxicosis? 
Select and explain. 
A. Upper pole, B. Lower pole, C. Middle pole, D. Lateral side
A: Upper pole
Answer: A: Upper pole 
Explanation: Ans. (a) Upper poleRef: Schwartz principles of surgery, 10th edition, Page 1531* At the level of insertion of superior thyroid artery due to increased blood flow the Bruit is heard at upper pole