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: Medicine
Dancing carotid is seen in - 
Select and explain. 
A. Thyrotoxicosis, B. Hypothyroidism, C. AV Fistuala, D. Blow out carotid
A: Thyrotoxicosis
Answer: A: Thyrotoxicosis 
Explanation: None